The two triangles are congruent. Find the value/measurement of Y. Explain your reasoning behind your answer.

A. 58.

B. 59.

C. 63.

D. 68.

What is always true about the angles of an isosceles triangle?

A. All three angles are congruent.
B. At least two of the angles are congruent.
C. The vertex angle is a right angle.
D. The vertex angle is obtuse.

Which shows two triangles that are congruent by the SSS congruence theorem?

A.

B.

C.

D.