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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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BuyFindarrow_forward

Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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Given: N Q M with angles
as shown in the
drawing
M P ¯ N Q ¯
Find: N M ,   M P ,   M Q ,
P Q , and NQ

Chapter 5.5, Problem 20E, Given: NQM with angles as shown in the drawing MPNQ Find: NM,MP,MQ, PQ, and NQ

To determine

To find:

NM, MP, MQ, PQ, and NQ in NQM with angles as shown in the drawing and with

MP¯NQ¯

Explanation

Approach:

For a right triangle, for which the measure of the interior angles 30°, 60°, and 90°; if ‘a’ is the length of measure of the shorter leg; opposite to the angle 30°, then the length of the other two sides is given by

Length of the longer leg (opposite to 60°) =a3

Length of the hypotenuse (opposite to 90°) =2a.

In general

Length of the longer leg =3× (Length of the shorter leg)

Length of the hypotenuse =2× (Length of the shorter leg)

For a right triangle for which the measure of the interior angles 45°, 45°, and 90°, if ‘a’ is the length of measure of one of the leg; opposite to the angle 45°, then the length of the other two sides is given by

Length of the other leg =a

Length of the hypotenuse =a2

In general

Length of the legs are equal.

Length of the hypotenuse =2× (Length of one of the legs)

Calculation:

Given,

MPNQ

Thus, NQM is divided into two right triangles as MNP and MPQ.

Here, MNP is of 30°-60°-90° type of right and MPQ is of 45°-45°-90° type of right triangle.

Now, in MNP NM is the hypotenuse and MP is the leg opposite to the 60° angle and which is the longer leg and the leg NP is the shorter leg.

Thus, in MNP

MN= Hypotenuse,

MP= Longer leg, and

NP= Shorter leg =3 units.

30°-60°-90° theorem.

In a right triangle whose angle measure 30°, 60°, and 90°, the hypotenuse has a length equal to twice the length of the shorter leg, and the longer leg is the product of 3 and the length of the shorter leg.

The hypotenuse =2× (Length of shorter leg)

NM=2×NP

NM=2×3

NM=6 units.

Again, by 30°-60°-90° theorem, we have

The longer leg =3× (Length of shorter leg)

MP=3×(NP)

MP=3×(3)

Mp=33 units

MP=5

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