Question

Triangle XYZ is isosceles. Angle Y measures a°. What expression represents the measure of angle X?

Answer 1

Answer:

The answer is D.) 180-2a

Step-by-step explanation:

Answer 2

An isosceles triangle has two sides equal and two angles equal. It is given in the problem that ∠Y is equal to a². We can solve for the remaining angles and the solution is shown below:
180°=∠X+∠Y+∠Z
180°=∠X+a° +∠Z
180°-a°-∠Z=∠X
If ∠Z is the same with ∠Y, then ∠X is equal to 180°-2a°.