What does isomorphic mean in leanera algebra?

Which expression gives you the distance between the points (5,1)and(9,-6)

Hi, can anyone show me how to do this problem? 100 points for this. in advance

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.