Question

The value of x is: 52 degrees. 128 degrees. 48 degrees. None of the choices are correct.

Answer 1

A. 52 degrees

Explanation:

Two sides are equal, so the triangle is an isosceles triangle.

Both base angles are equal.

x = 52

Answer 2

52°

Explanation:

Since the side 52° is 10 and is congruent to the other side x° (also has 10), we know that the triangle is isosceles and that the 2 angles are congruent (by definition of an isosceles triangle). We could also use Law of Sines and Law of Cosines to prove this.