Question

Which statement is a theorem?a. An endpoint is a point at one end of a segment or the starting point of a ray.b. If two angles are complementary to the same angle, then the two angles are congruent.c. If two lines intersect, then they intersect in exactly one point.d. A plane is a flat surface that has no thickness and extends forever.

Answer 1

The correct answer is option b. If two angles are complementary to the same angle, then the two angles are congruent.

This is called the Congruent Complements Theorem.