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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 that m A = 2 x + 3 , and m C = 3 x - 27 , find the measure of each angle of Chapter 4.1, Problem 10E, Given that mA=2x+3, and mC=3x-27, find the measure of each angle of . , example  1.

Chapter 4.1, Problem 10E, Given that mA=2x+3, and mC=3x-27, find the measure of each angle of . , example  2

To determine

To find:

The measure of each angle of ABCD.

Explanation

Given:

Given that mA=2x+3, and mC=3x-27, and the ABCD as shown below.

Corollary:

1. The opposite angles of a parallelogram are congruent.

2. Two consecutive angles of a parallelogram are supplementary.

In the given parallelogram ABCD, given that mA=2x+3, and mC=3x-27.

As per the corollary that the opposite angles of a parallelogram are congruent, the opposite angles mA and mC are equal or mA=mC and also mB and mD are equal or mB=mD.

To find the value of x, substitute mA=2x+3, and mC=3x-27 in mA=mC

2x+3=3x-27

2x-3x=-27-3

-x=-30

x=30

To find mA, substitute x =30 in mA=

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