A submarine is traveling 200 feet below the surface in a horizontal line parallel the surface of the water. The submarine makes a dive that makes a 21° angle with the horizontal. If the submarine travels 128 feet along the diagonal path, how deep will the submarine be?

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.