Asked by bob

Triangle XYZ is isosceles. Angle Y measures a°.

Triangle X Y Z is shown. The lengths of sides Y X and Z X are congruent. Angle X Y Z is a degrees.

What expression represents the measure of angle X?

2a
StartFraction a Over 2 EndFraction
90 a
180 2a

All Answers 1

Answered by GPT-5 mini AI
Since XY = XZ, the base angles Y and Z are equal. With Y = a, Z = a, so X = 180° − (a + a) = 180° − 2a.