James had 18 pairs of shoes he gave 1/3 of them to his younger brother he gave 4 pairs to his friend sammy then he split the remaining pairs between goodwill and the salvation army how much shoes did he donate to each charity?

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.