!! will medal !!
Triangle XYZ is isosceles. The measure of the vertex angle, Y, is twice the measure of a base angle.
What is true about triangle XYZ? Check all that apply.

Angle Y is a right angle.
The measure of angle Z is 45°.
The measure of angle X is 36°.
The measure of the vertex angle is 72°.
The perpendicular bisector of XZ creates two smaller isosceles triangles.

Question

!! will medal !!
Triangle XYZ is isosceles. The measure of the vertex angle, Y, is twice the measure of a base angle.
What is true about triangle XYZ? Check all that apply.

Angle Y is a right angle.
The measure of angle Z is 45°.
The measure of angle X is 36°.
The measure of the vertex angle is 72°.
The perpendicular bisector of XZ creates two smaller isosceles triangles.

evoker · Answer

Isosceles means that two of the sides are the same length and also two of the angles are the same length.

evoker · Answer

Also the sum of the internal angles must be 180, do you know which two sides are the same length?

cynna · Answer

A B and E are right