What is the relationship between the base angles of an isosceles triangle? Explain.The base angles are complementary because their sum is 90°.The base angles are supplementary because their sum is 180°.The base angles are adjacent to the legs of the triangle.The base angles are opposite the congruent sides, and they are congruent by the Base Angles Theorem.

Answer:The base angles of an isosceles triangle are opposite the congruent sides, and they are congruent by the Base Angles Theorem.Step-by-step explanation:The Base Angle Theorem states that in an isosceles triangle, the angles opposite the congruent sides are congruent.