Question

What is a real-life example of a complementary angle?

Answer 1

Anywhere, where right triangles occur, you can see complementary acute angles of this triangle.

Explanation:

For example, when a rectangular piece of bread in divided in two pieces by cutting along the diagonal, we get to right triangles, each with a pair of complementary angles.

Very often, when a perpendicular to ground poll needs to be reinforced, a couple of lines are attached to its top and at angle are anchored in the ground nearby. This produces right triangles with two complementary acute angles.