In fkr, which side is included between f and r

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

What does independent variable and dependent variable mean in math?

The statements below can be used to prove that the triangles are similar. ? △abc ~ △xyz by the sss similarity theorem. which mathematical statement is missing? ∠b ≅ ∠y ∠b ≅ ∠z