Question

FIND THE ERROR Shanice is looking at the figure shown, which shows two congruent triangles. She sees that A′ coincides with A and decides that A is the center of rotation. She measures the angle that rotates B to B ′ about A and finds it to be 30°. She then claims that because the two triangles are congruent, a 30° rotation has occurred about A. Is Shanice correct?

Answer 1

No, Shanice is not correct. A 30° rotation about point A does not guarantee congruence between the two triangles.