Question

Greg and Lu are building a toy hydraulic crane, as shown in the picture.

What is m∠ABC?
A) 100°
B) 115°
C) 120°
D) 135°

Answer 1

D

Explanation:

credit goes to the one that answered it

Notice that there is a triangle with two of the angles given. We know that the sum of any triangle's angles will always be 180°. Thus, we can subtract the two given angles from 180, and that will give us the measure of angle ABC.

180 - 20 - 25 = 160 - 25 = 135

The measure of angle ABC is 135°.

The correct option is D.

Answer 2

So,

Notice that there is a triangle with two of the angles given. We know that the sum of any triangle's angles will always be 180°. Thus, we can subtract the two given angles from 180, and that will give us the measure of angle ABC.

180 - 20 - 25 = 160 - 25 = 135

The measure of angle ABC is 135°.

The correct option is D.