   Chapter 2.CR, Problem 2CR ### 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
1 views

# Given: m ∠ 13 = 70 ° Find: m ∠ 3 To determine

To find:

The measure of 3.

Explanation

Given:

The given statement is,

m13=70°abcd

Figure (1)

Properties:

(1) Vertically opposite angles are of same measure.

(2) If two parallel lines are cut by a transversal, then a pair of corresponding angles is congruent.

(3) Supplementary angles add up to 180°.

Calculation:

The given statement is,

m13=70°abcd

13 and 10 are vertically opposite angles.

So,

1310m13=m10

Substitute 70° for m13 in the above equation

m10=70°

3 and 11 are corresponding angles

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