Question

In a triangle, the second angle is twice the measure of the first, and the third angle is three times the measure of the second. Find the measure of the third angle.

Answer 1

i just took the test the ANSWER IS (C) 120

Explanation:

Answer 2

if first angle = x then second angle = 2x and third angle = 2x*3 = 6x

so 6x + 2x + x = 180
9x = 180
x = 20

third angle = 6 *20 = 120