432,007 views
14 votes
14 votes
1. What is the measure of

a. 30 degrees
b. 45 degrees
c. 60 degrees
d. 90 degrees

1. What is the measure of a. 30 degrees b. 45 degrees c. 60 degrees d. 90 degrees-example-1
User AndreyS Scherbakov
by
2.6k points

1 Answer

15 votes
15 votes

Answer:

a. 30°

Explanation:

The geometric shape shown in the image is an isosceles triangle.

The top angle is 120 and the sum of interior angles in a triangle is equal to 180°.

The angles on the bottom (both legs) are equal, let x represent it so we can write the following equation:

120 + x + x = 180 add like terms

120 + 2x = 180 subtract 120 from both sides

2x = 60 divide both sides by 2

x = 30

User Benjin
by
3.3k points