Addition of rational expressions using factoring. with step by step explanation please:)

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*