Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN: 9781337614085
Author: Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher: Cengage,
Bartleby Related Questions Icon

Related questions

bartleby

Concept explainers

Question

Please help fill in the blanks of the two-column proof.

The proof is in the picture.

A.
C.
Given: D is the midpoint of BC of triangle ABC
Prove: EF//BC
E.
expand button
Transcribed Image Text:A. C. Given: D is the midpoint of BC of triangle ABC Prove: EF//BC E.
6.
Given: D is the midpoint of BC of triangle ABC
Prove: EF//BC
Statements
Reasons
1.D is the midpoint of side BC of triangle 1.Given
ABC and the bisectors of angles ADB
and ADC meet AB and AC at E and F
respectively
2.Triangle ABC = triangle AEF
2.lf two angles of one triangle are equal
respectively to two angles of another,
then the triangle are similar. (a.a.)
3.AE + EB = AB & AF+FC = AC
3.Segment Addition Postulate
4.Triangle BDE = triangle ADE & triangle
CDF = triangle ADF
4.Definition of angle bisector
5.AE/EB = AF/FC
5.Corresponding sides of similar
triangles are proportional (C.S.S.T.P.)
6.Angle ABD = angle AEF & angle BCA =
angle EFA
6.Corresponding Angles Postulate
7.DE bisects AB and DF bisects AC
proportionally
8.EF II BC
8. If a line divides two sides of a triangle
proportionally, then it is parallel to the
third side. (Theorem 54)
7.
5.
expand button
Transcribed Image Text:6. Given: D is the midpoint of BC of triangle ABC Prove: EF//BC Statements Reasons 1.D is the midpoint of side BC of triangle 1.Given ABC and the bisectors of angles ADB and ADC meet AB and AC at E and F respectively 2.Triangle ABC = triangle AEF 2.lf two angles of one triangle are equal respectively to two angles of another, then the triangle are similar. (a.a.) 3.AE + EB = AB & AF+FC = AC 3.Segment Addition Postulate 4.Triangle BDE = triangle ADE & triangle CDF = triangle ADF 4.Definition of angle bisector 5.AE/EB = AF/FC 5.Corresponding sides of similar triangles are proportional (C.S.S.T.P.) 6.Angle ABD = angle AEF & angle BCA = angle EFA 6.Corresponding Angles Postulate 7.DE bisects AB and DF bisects AC proportionally 8.EF II BC 8. If a line divides two sides of a triangle proportionally, then it is parallel to the third side. (Theorem 54) 7. 5.
Expert Solution
Check Mark
Blurred answer
Knowledge Booster
Geometry
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, geometry and related others by exploring similar questions and additional content below.
Similar questions
    • SEE MORE QUESTIONS
    Recommended textbooks for you
  • Elementary Geometry For College Students, 7e
    Geometry
    ISBN:9781337614085
    Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
    Publisher:Cengage,
    Holt Mcdougal Larson Pre-algebra: Student Edition...
    Algebra
    ISBN:9780547587776
    Author:HOLT MCDOUGAL
    Publisher:HOLT MCDOUGAL
    Elementary Geometry for College Students
    Geometry
    ISBN:9781285195698
    Author:Daniel C. Alexander, Geralyn M. Koeberlein
    Publisher:Cengage Learning
  • Elementary Algebra
    Algebra
    ISBN:9780998625713
    Author:Lynn Marecek, MaryAnne Anthony-Smith
    Publisher:OpenStax - Rice University
  • Elementary Geometry For College Students, 7e
    Geometry
    ISBN:9781337614085
    Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
    Publisher:Cengage,
    Holt Mcdougal Larson Pre-algebra: Student Edition...
    Algebra
    ISBN:9780547587776
    Author:HOLT MCDOUGAL
    Publisher:HOLT MCDOUGAL
    Elementary Geometry for College Students
    Geometry
    ISBN:9781285195698
    Author:Daniel C. Alexander, Geralyn M. Koeberlein
    Publisher:Cengage Learning
    Elementary Algebra
    Algebra
    ISBN:9780998625713
    Author:Lynn Marecek, MaryAnne Anthony-Smith
    Publisher:OpenStax - Rice University