Question

What can you say about the marked angles?
A.The marked angles are supplementary. The two angles add to 180°
B.The marked angles are complementary (add to 90° in a right triangle
C.The triangle is equilateral so all angles are equal, the marked angles are equal D.The marked angles are 45° in all three triangles

Answer 1

the marked angles are complementary → B

All 3 triangles are right with one angle = 90°

the sum of the angles in a triangle = 180°

thus the remaining 2 marked angles sum to 90°, thus are complementary