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Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

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Chapter
Section
BuyFindarrow_forward

Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

In Exercises 15 to 19, create drawings as needed.

Given: A B C with m A = m B = 45 ° and
B C = 6
Find: A C and A B

To determine

To find:

AC and AB, for the ABC with mA=mB=45° and BC=6.

Explanation

Approach:

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,

ABC with mA=mB=45° and BC=6.

Since, two of the angles mA and mB are 45°, the triangle is a right triangle of 45°-45°-90° type with BC=6.

45°-45°-90° theorem

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