Chapter 10.3, Problem 10Q

To determine

The measure of angle 1 and angle 2..

Answer to Problem 10Q

  $\angle 1\text{=}\angle 2=123°$

Explanation of Solution

Given:

  

Solution:

In the given description,

  $\angle 2=123°$ (by property of vertically opposite angle)

Now,

  $\angle 1\text{and}\angle 2$ are interior alternate angle.

By the property of interior exterior angle,

  $\angle 1\text{=}\angle 2$

So,

  $\angle 1\text{=}\angle 2=123°$