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7th Edition

Alexander + 2 others

Publisher: Cengage,

ISBN: 9781337614085

Chapter 5.4, Problem 10E

Textbook Problem

Find *DF *if:

a)

b)

*Exercises 7-10*

Elementary Geometry For College Students, 7e

Ch. 5.1 - In Exercises 1 to 4, give the ratios in simplified...Ch. 5.1 - In Exercises 1 to 4, give the ratios in simplified...Ch. 5.1 - In Exercises 1 to 4, give the ratios in simplified...Ch. 5.1 - In Exercises 1 to 4, give the ratios in simplified...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...

Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - In Exercises 5 to 14, find the value of x in each...Ch. 5.1 - Sarah ran the 300-m hurdles in 47.7 sec. In meters...Ch. 5.1 - Fran has been hired to sew the dance troupes...Ch. 5.1 - In Exercises 17 to 22, use proportions to solve...Ch. 5.1 - In Exercises 17 to 22, use proportions to solve...Ch. 5.1 - In Exercises 17 to 22, use proportions to solve...Ch. 5.1 - In Exercises 17 to 22, use proportions to solve...Ch. 5.1 - In Exercises 17 to 22, use proportions to solve...Ch. 5.1 - In Exercises 17 to 22, use proportions to solve...Ch. 5.1 - The salaries of a secretary, a salesperson, and a...Ch. 5.1 - The salaries of a school cook, custodian, and bus...Ch. 5.1 - If the measures of the angles of a quadrilateral...Ch. 5.1 - If the measures of the angles of a quadrilateral...Ch. 5.1 - The measures of two complementary angles are in...Ch. 5.1 - The measures of two supplementary angles are in...Ch. 5.1 - If 1 in. equals 2.54 cm, use a proportion to...Ch. 5.1 - If 1 kg equals 2.2 lb, use a proportion to convert...Ch. 5.1 - For the quadrilaterals shown, MNWX=NPXY=PQYZ=MQWZ....Ch. 5.1 - For this exercise, use the drawing and extended...Ch. 5.1 - Two numbers a and b are in the ratio 3:4. If the...Ch. 5.1 - Two numbers a and b are in the ratio 2:3. If both...Ch. 5.1 - If the ratio of the measure of the complement of...Ch. 5.1 - If the ratio of the measure of the complement of...Ch. 5.1 - On a blueprint, a 1-in. scale corresponds to 3 ft....Ch. 5.1 - To find the golden ratio see the Discover activity...Ch. 5.1 - Find a the exact length of an ideal rectangle with...Ch. 5.1 - Prove: If ab=cd where a, b, c and d are nonzero,...Ch. 5.1 - Prove: If ab=cd where b0 and d0, then a+bb=c+dd.Ch. 5.1 - In the figure, assume that a 0. Prove that...Ch. 5.1 - In the figure, assume that a 0. Prove that...Ch. 5.2 - a What is true of any pair of corresponding angles...Ch. 5.2 - a Are any two quadrilaterals similar? b Are any...Ch. 5.2 - a Are any two regular pentagons similar? b Are any...Ch. 5.2 - a Are any two equilateral hexagons similar? b Are...Ch. 5.2 - In Exercises 5 and 6, refer to the drawing. a...Ch. 5.2 - In Exercises 5 and 6, refer to the drawing. a If...Ch. 5.2 - A sphere is the three-dimensional surface that...Ch. 5.2 - Given that rectangle ABCE is similar to rectangle...Ch. 5.2 - Given: MNPQRS,mM=56,mR=82,MN=9,QR=6,RS=7,MP=12...Ch. 5.2 - Given: ABCPRC,mA=67,PC=5,CR=12,PR=13,AB=26 Find: a...Ch. 5.2 - a Does the similarity relationship have a...Ch. 5.2 - Using the names of property from Exercise 11,...Ch. 5.2 - If the drawing, HJKFGK. If HK=6,KF=8, and HJ=4,...Ch. 5.2 - If the drawing, HJKFGK. If HK=6,KF=8, and FG=5,...Ch. 5.2 - Quadrilateral ABCD quadrilateral HJKL. If mA=55,...Ch. 5.2 - Quadrilateral ABCD quadrilateral HJKL. If...Ch. 5.2 - Quadrilateral ABCD quadrilateral HJKL. If...Ch. 5.2 - Quadrilateral ABCD quadrilateral HJKL. If...Ch. 5.2 - Quadrilateral ABCD quadrilateral HJKL. If...Ch. 5.2 - Quadrilateral ABCD quadrilateral HJKL. If...Ch. 5.2 - In Exercises 21 to 24, ADEABC. Given:...Ch. 5.2 - In Exercises 21 to 24, ADEABC. Given:...Ch. 5.2 - In Exercises 21 to 24, ADEABC. Given:...Ch. 5.2 - In Exercises 21 to 24, ADEABC. Given:...Ch. 5.2 - Pentagon ABCDE pentagon GHJKL not shown, AB=6, and...Ch. 5.2 - Quadrilateral MNPQ quadrilateral WXYZ not shown,...Ch. 5.2 - A blueprint represents the 72-ft length of a...Ch. 5.2 - A technical drawing shows the 312 ft lengths of...Ch. 5.2 - In Exercises 29 to 32, use the fact that triangles...Ch. 5.2 - In Exercise 29 to 32, use the fact that triangles...Ch. 5.2 - In Exercise 29 to 32, use the fact that triangles...Ch. 5.2 - In Exercise 29 to 32, use the fact that triangles...Ch. 5.2 - In the drawing, ABDCEF with transversals l and m....Ch. 5.2 - In the drawing, ABDCEF. Suppose that transversals...Ch. 5.2 - Given ABC, a second triangle (XTN) is constructed...Ch. 5.2 - Given RST, a second triangle (UVW) is constructed...Ch. 5.2 - Henry watches his 32 inch diagonal LCD television...Ch. 5.2 - Use D=4.3V to find the ideal viewing distance V...Ch. 5.2 - For Exercises 39 to 40, use intuition to from a...Ch. 5.2 - For Exercises 39 to 40, use intuition to from a...Ch. 5.3 - What is the acronym that is used to represent each...Ch. 5.3 - Classify as true or false. a Any two rectangles...Ch. 5.3 - Classify as true or false: a If the vertex angles...Ch. 5.3 - Classify as true or false: a If the midpoints of...Ch. 5.3 - In Exercises 5 to 8, name the method...Ch. 5.3 - In Exercises 5 to 8, name the method...Ch. 5.3 - In Exercises 5 to 8, name the method...Ch. 5.3 - In Exercises 5 to 8, name the method...Ch. 5.3 - In Exercises 9 to 12, name the method that...Ch. 5.3 - In Exercises 9 to 12, name the method that...Ch. 5.3 - In Exercises 9 to 12, name the method that...Ch. 5.3 - In Exercises 9 to 12, name the method that...Ch. 5.3 - In Exercises 13 to 16, provide the missing...Ch. 5.3 - In Exercises 13 to 16, provide the missing...Ch. 5.3 - In Exercises 13 to 16, provide the missing...Ch. 5.3 - In Exercises 13 to 16, provide the missing...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 17 to 24, complete each proof. Given:...Ch. 5.3 - In Exercises 25 to 28, ABCDBE Exercises 25-28...Ch. 5.3 - In Exercises 25 to 28, ABCDBE Exercises 25-28...Ch. 5.3 - In Exercises 25 to 28, ABCDBE Exercises 25-28...Ch. 5.3 - In Exercises 25 to 28, ABCDBE Exercises 25-28...Ch. 5.3 - CDECBA with CDEB. If CD=10,DA=8 and CE=6, find EB....Ch. 5.3 - CDECBA with CDEB. If CD=10,CA=16 and EB=12, find...Ch. 5.3 - ABFCBD with obtuse angles at vertices D and F as...Ch. 5.3 - ABFCBD with obtuse angles at vertices D and F as...Ch. 5.3 - In Exercise 33, provide a two-column proof....Ch. 5.3 - In Exercise 34, provide a paragraph proof. Given:...Ch. 5.3 - Use a two-column proof to prove the following...Ch. 5.3 - Provide a paragraph proof for the following...Ch. 5.3 - Use the result of Exercise 13 to do the following...Ch. 5.3 - Use the result of Exercise 13 to do the following...Ch. 5.3 - The distance across a pond is to be measured...Ch. 5.3 - In the figure, ABCADB. Find AB if AD=2 and DC=6.Ch. 5.3 - Prove that the altitude drawn to the hypotenuse of...Ch. 5.3 - Prove that the line segment joining the midpoints...Ch. 5.3 - The vertices of rhombus ARST lie on ABC as shown....Ch. 5.4 - By naming the vertices in order, state three...Ch. 5.4 - Use theorem 5.4.2 to form a proportion in which SV...Ch. 5.4 - Use theorem 5.4.3 to form a proportion in which RS...Ch. 5.4 - Use theorem 5.4.3 to form a proportion in which TS...Ch. 5.4 - Use theorem 5.4.2 to find RV if SV=6 and VT=8....Ch. 5.4 - Use theorem 5.4.3 to find RT if RS=6 and VR=4....Ch. 5.4 - Find the length of DF if: a DE=8 and EF=6. b DE=5...Ch. 5.4 - Find the length of DE if: a DF=13 and EF=5. b...Ch. 5.4 - Find EF if: a DF=17 and DE=15. b DF=12 and DE=82....Ch. 5.4 - Find DF if: a DE=12 and EF=5 b DF=12 and EF=6....Ch. 5.4 - Determine whether each triple (a,b,c) is a...Ch. 5.4 - Determine whether each triple (a,b,c) is a...Ch. 5.4 - Determine the type of triangle represented if the...Ch. 5.4 - Determine the type of triangle represented if the...Ch. 5.4 - A guy wire 25 ft long supports an antenna at a...Ch. 5.4 - A strong wind holds a kite 30 ft above the earth...Ch. 5.4 - A boat is 6 m below the level of a pier and 12 m...Ch. 5.4 - A hot-air balloon is held in place by the ground...Ch. 5.4 - A drawbridge that is 104 ft in length is raised at...Ch. 5.4 - A drawbridge that is 136 ft in length is raised at...Ch. 5.4 - A rectangle has a width of 16 cm and a diagonal of...Ch. 5.4 - A right triangle has legs of lengths x and 2x2 and...Ch. 5.4 - A rectangle has base length x3, altitude length...Ch. 5.4 - The diagonals of a rhombus measure 6 m and 8 m....Ch. 5.4 - Each side of a rhombus measure 12 in. If one...Ch. 5.4 - An isosceles right triangle has a hypotenuse of...Ch. 5.4 - Each leg of an isosceles right triangle has a...Ch. 5.4 - In right ABC with right C, AB=10 and BC=8. Find...Ch. 5.4 - In right ABC with right C, AB=17 and BC=15. Find...Ch. 5.4 - Find the length of the altitude to the 10-in. side...Ch. 5.4 - Find the length of the altitude to the 26-in. side...Ch. 5.4 - In quadrilateral ABCD, BCAB and DC diagonal AC. If...Ch. 5.4 - In quadrilateral RSTU, RSST and UT diagonal RT. If...Ch. 5.4 - Given: ABC is not a right Prove: a2+b2c2 Note: AB...Ch. 5.4 - If a=p2q2,b=2pq and c=p2+q2, show that c2=a2+b2.Ch. 5.4 - Given that the line segment shown has a length 1,...Ch. 5.4 - Using the line segment from Exercise 36, construct...Ch. 5.4 - When the rectangle in the accompanying drawing...Ch. 5.4 - A, C and F are three of the vertices of the cube...Ch. 5.4 - Find the length of the altitude to the 8-in side...Ch. 5.4 - In the figure, square RSTV has its vertices on the...Ch. 5.4 - Prove that if (a,b,c) is a Pythagorean triple and...Ch. 5.4 - Use Figure 5.19 to prove Theorem 5.4.2. Theorem...Ch. 5.4 - Use Figures 5.20 and 5.21 to prove Lemma 5.4.3....Ch. 5.4 - For quadrilateral ABCD,AC and BD are diagonals....Ch. 5.5 - For the 45-45-90 triangle shown, suppose that...Ch. 5.5 - For the 45-45-90 triangle shown, suppose that...Ch. 5.5 - For the 30-60-90 triangle shown, suppose that...Ch. 5.5 - For the 30-60-90 triangle shown, suppose that...Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 5 to 22, find the missing lengths....Ch. 5.5 - In Exercises 15 to 19, create drawings as needed....Ch. 5.5 - In Exercises 15 to 19, create drawings as needed....Ch. 5.5 - In Exercises 15 to 19, create drawings as needed....Ch. 5.5 - In Exercises 15 to 19, create drawings as needed....Ch. 5.5 - In Exercises15 to 19, create drawing as needed....Ch. 5.5 - Given: NQM with angles as shown in the drawing...Ch. 5.5 - Given: XYZ with angles as shown in the drawing...Ch. 5.5 - Given: Rhombus ABCD not shown in which diagonals...Ch. 5.5 - A carpenter is working with a board that is 334...Ch. 5.5 - To unload groceries from a delivery truck at the...Ch. 5.5 - A jogger runs along two sides of an open...Ch. 5.5 - Maras boat leaves the dock at the same time that...Ch. 5.5 - In Exercises 27 to 33, give both exact solutions...Ch. 5.5 - In Exercises 27 to 33, give both exact solutions...Ch. 5.5 - Prob. 29ECh. 5.5 - Prob. 30ECh. 5.5 - In Exercises 27 to 33, give both exact solutions...Ch. 5.5 - In Exercises 27 to 33, give both exact solutions...Ch. 5.5 - In Exercises 27 to 33, give both exact solutions...Ch. 5.5 - Note: Exercises preceded by an asterisk are of a...Ch. 5.5 - In regular hexagon ABCDEF, AB=6 inches. Find the...Ch. 5.5 - In regular hexagon ABCDEF, the length of AB is x...Ch. 5.5 - In right triangle XYZ, XY=3 and YZ=4. If V is the...Ch. 5.5 - Diagonal EC separates pentagon ABCDE into square...Ch. 5.5 - For equilateral RST, RT=6. Squares and triangles...Ch. 5.6 - Note: Exercises preceded by an asterisk are of a...Ch. 5.6 - Note: Exercises preceded by an asterisk are of a...Ch. 5.6 - Given that ABEF=BCFG=CDGH, are the following...Ch. 5.6 - Given that XYTS, are the following proportion...Ch. 5.6 - Given: l1l2l3l4,AB=5,BC=4,CD=3,EH=10 Find:...Ch. 5.6 - Given: l1l2l3l4,AB=7,BC=5,CD=4,EF=6 Find: FG,GH,EHCh. 5.6 - Given: l1l2l3,AB=4,BC=5,DE=x,EF=12x Find: x,DE,EFCh. 5.6 - Given: l1l2l3,AB=5,BC=x,DE=x2,EF=7 Find: x,BC,DECh. 5.6 - Given: DEBC,AD=5,DB=12,AE=7 Find: ECCh. 5.6 - Given: DEBC,AD=6,DB=10,AC=20 Find: ECCh. 5.6 - Given: DEBC,AD=a1,DB=2a+2,AE=a,EC=4a5 Find: aandADCh. 5.6 - Given: DEBC,AD=5,DB=a+3,AE=a+1,EC=3(a1) Find:...Ch. 5.6 - Given: RW bisects SRT Do the following equalities...Ch. 5.6 - Given: RW bisects SRT Do the following equalities...Ch. 5.6 - Given: UT bisects WUV,WU=8,UV=12,WT=6 Find: TVCh. 5.6 - Given: UT bisects WUV,WU=9,UV=12,WV=9 Find: WTCh. 5.6 - Given: NQ bisects MNP,NP=MQ,QP=8,MN=12 Find: NPCh. 5.6 - Exercises 18 and 19 are based on a theorem not...Ch. 5.6 - Exercises 18 and 19 are based on a theorem not...Ch. 5.6 - Given: In ABC,AD bisects BAC AB=20 and AC=16 Find:...Ch. 5.6 - In ABC,ACB is trisected by CD and CE so that 123....Ch. 5.6 - In ABC,mCAB=80,mACB=60,andABC=40. With the angle...Ch. 5.6 - In ABC,AC=5.3,BC=7.2 and BA=6.7. With angle...Ch. 5.6 - In right RST not shown with right S,RV bisects SRT...Ch. 5.6 - Given: RV bisects SRT, RS=x6,SV=3, RT=2x, and...Ch. 5.6 - Given: MR bisects NMP, MN=2x,NR=x, RP=x+1, and...Ch. 5.6 - Given point D in the interior of RST, which...Ch. 5.6 - In RST, suppose that RH,TG, and SK are medians....Ch. 5.6 - Given point D in the interior of RST, suppose that...Ch. 5.6 - Given point D in the interior of RST, suppose that...Ch. 5.6 - Complete the proof of this property: If ab=cd,...Ch. 5.6 - Given: RST, with XYRT and YZRS Prove: RXXS=ZTRZCh. 5.6 - Use Theorem 5.6.1 and the drawing to complete the...Ch. 5.6 - Use Exercise 33 and the following drawing to...Ch. 5.6 - Use Theorem 5.6.3 to complete the proof of this...Ch. 5.6 - In right ABC,mB=30. Also, AB=123 and AD bisects...Ch. 5.6 - In right ADC,DC=5 and AC=53. If AD bisects BAC,...Ch. 5.6 - In right ABC with right C,AD bisects BAC. If AC=6...Ch. 5.6 - Given: ABC not shown is isosceles with...Ch. 5.6 - Given: RST with right RST; mR=30 and ST=6; RST is...Ch. 5.6 - In the figure, the angle bisectors of ABC...Ch. 5.6 - In RST, the altitudes of the triangle intersect at...Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Answer true or false for review Exercises 1 to 7....Ch. 5.CR - Find the values of x in each proportion: a x6=3x c...Ch. 5.CR - Use proportions to solve Review Exercises 9 to 11....Ch. 5.CR - Use proportions to solve Review Exercises 9 to 11....Ch. 5.CR - Use proportions to solve Review Exercises 9 to 11....Ch. 5.CR - The ratio of the measures of sides of a...Ch. 5.CR - The length and width of a rectangle are 18 and 12,...Ch. 5.CR - The length of the sides of a triangle are 6, 8 and...Ch. 5.CR - The ratio of the measure of the supplement of an...Ch. 5.CR - Name the method AA, SSS, or SAS that is used to...Ch. 5.CR - Given: ABCD is a parallelogram. DB intersects AE...Ch. 5.CR - Given:12. Prove: ABAC=BECDCh. 5.CR - Given: ABC~DEF not shown A=50,E=33D=2x+40 Find:...Ch. 5.CR - Given: InABC~DEF(notshown) not shown...Ch. 5.CR - For Review Exercises 21 to 23, DEAC...Ch. 5.CR - For Review Exercises 21 to 23, DEAC...Ch. 5.CR - For Review Exercises 21 to 23, DEAC...Ch. 5.CR - For Review Exercises 24 to 26, GJ bisects FGH...Ch. 5.CR - For Review Exercises 24 to 26, GJ bisects FGH...Ch. 5.CR - For Review Exercises 24 to 26, GJ bisects FGH...Ch. 5.CR - Given:...Ch. 5.CR - Prove that if a line bisects one side of a...Ch. 5.CR - Prove that the diagonals of a trapezoid divide...Ch. 5.CR - Given: ABCwithrightBACADBC...Ch. 5.CR - Given: ABCwithrightBACADBC...Ch. 5.CR - In drawings shown, find x.Ch. 5.CR - Given:...Ch. 5.CR - Find the length of a diagonal of a square whose...Ch. 5.CR - Find the length of a side of a square whose...Ch. 5.CR - Find the length of a side of a rhombus whose...Ch. 5.CR - Find the length of an altitude of an equilateral...Ch. 5.CR - Find the length of a side of an equilateral...Ch. 5.CR - The length of the three sides of a triangle are...Ch. 5.CR - In the drawings, find x and y.Ch. 5.CR - An observation aircraft flying at a height of 12...Ch. 5.CR - Tell whether each set of numbers represents the...Ch. 5.CT - Reduce to its simplest form: a The ratio 12:20 b...Ch. 5.CT - Solve each proportion for x. a x5=813 b x+15=16x-1Ch. 5.CT - The measures of two complementary angles are in...Ch. 5.CT - RTS~UWV. a Find m W if m R=67 and m S=21. b Find...Ch. 5.CT - Give the reason AA, SAS, or SSS why RTS~UTW. a RU...Ch. 5.CT - In right triangle ABC,CD- is the altitude from C...Ch. 5.CT - In ABC,mC=90. Use a square root radical to...Ch. 5.CT - Given its lengths of sides, is RST a right...Ch. 5.CT - Given quadrilateral ABCD with diagonal AC-. If...Ch. 5.CT - In XYZ,XZ-YZ- and Z is a right angle. a Find XY if...Ch. 5.CT - In DEF,D is a right angle and m F=30. a Find DE if...Ch. 5.CT - In ABC,DE||BC-. If AD = 6, DB = 8, and AE = 9,...Ch. 5.CT - In MNP,NQ bisects MNP. If PN = 6, MN = 9, and MP =...Ch. 5.CT - For ABC, the three angle bisectors are shown. Find...Ch. 5.CT - Given: 1C; M is the midpoint of BC-;CM=MB=6 and...Ch. 5.CT - In Exercises 16 and 17, complete the statements...Ch. 5.CT - In Exercises 16 and 17, complete the statements...

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In Exercises 1-4, the given triangles are similar. Find the lengths of the missing sides.

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ReminderRound all answers to two decimal places unless otherwise indicated. Calculating LimitsIn Exercises 7 th...

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For the following exercises, P is a point on the unit circle, a. Find the (exact) missing coordinate value of e...

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A ball is thrown upward from a height of 1.5 m at an initial speed of 40 m/sec. Acceleration resulting from gra...

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Discuss how to find an alternative two-parameter family of solutions for the nonlinear differential equation y ...

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