Question

An isosceles triangle has base angles that each measure 42*. Which equation can be used to find z, the measure of the third angle of this isosceles triangle in degrees?

A) 84 + 2z = 180
B) 84 + z = 180
C) 42 + 2z = 180
D) 42 + z = 180

Answer 1

the answer is (B) it is clearly.

Answer 2

B) 84 + z = 180, since 42*2=84, 180-84=96, z=96