Question

Find the value of x.
A) 55
B) 60
C) 70
D) 125

Answer 1

x = 70°

Explanation:

The given triangle has 2 equal sides and is therefore isosceles.

The base angles are equal, both 55°

To find x subtract the sum of the 2 angles from 180

x = 180° - (55 + 55)° = 180° - 110° = 70°