Question

Find the value of x in the triangle shown below.

Answer 1

The answer is almost certain to be 180

Answer 2

102 degrees.

Explanation:

Because the 3.3's are congruent (the same), this triangle is isosceles.

A property of isosceles means that the two angles are congruent.

39+39= 78

This means that the last angle must be 180-78.