   Chapter 1.5, Problem 7E ### Elementary Geometry for College St...

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

#### Solutions

Chapter
Section ### Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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# In Exercises 7 10, state the property or definition that justifies the conclusion (the “then” clause).Given that ∠ s   1 and ∠ s   2 are supplementary, then m ∠ 1 + m ∠ 2 = 180 ° .

To determine

To find:

The property or definition that justifies the conclusion of the statement “Given that s1 and 2 are supplementary, then m1+m2=180°”.

Explanation

Given:

The statement is “Given that s1 and 2 are supplementary, then m1+m2=180°”.

Approach:

The given statement is based on hypothesis and conclusion. Let 1 and 2 are supplementary be the hypothesis and m1+m2=180° be the conclusion. Try those algebraic properties which justify the conclusion.

If the sum of two angles is 180°, then the angles are known as supplementary angles

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