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.

Let the vertex angle = 2x degrees then the 2 base angles will both be x
So we have
2x + x + x = 180
4x = 180
x = 45

So the triangle will  be  right angled  and have angles 45-45-90 degrees.

Idk i am in 5th grade lol