Question

1. how many congruent angles does an isosceles triangle have? none of them 1 3 2

Explanation:

An isosceles triangle is defined as a triangle with at least two sides of equal length. By the Isosceles Triangle Theorem, the angles opposite those equal sides are congruent. So, an isosceles triangle has two congruent angles (the base angles). If it were equilateral (a special case of isosceles), it would have three congruent angles, but the general isosceles triangle has two. The options "None of them", "1", and "3" don't fit the general definition.

Answer:

D. 2 (assuming the last option with "2" is labeled D; if the original labels were different, adjust the identifier, but the text is "2")