单选题Two polygons must congruent if ______.A they are both regularB they have the same number of sidesC their corresponding sides and angles are equalD their corresponding sides are equalE they have the same shape
题目
单选题
Two polygons must congruent if ______.
A
they are both regular
B
they have the same number of sides
C
their corresponding sides and angles are equal
D
their corresponding sides are equal
E
they have the same shape