To derive the standard formula of a circle, a radius r is constructed as the hypotenuse of a right triangle as shown.What are the lengths of the sides of the right triangle that is formed? Check all that apply.hkh – kx – hx – yy – hy – kURGENT HELP NEEDED. WILL GIVE BRAINLIEST IF CORRECT.

Center is (h,k) and point E is (x,y) . We have to find the length of the legs which are used to derive the standard formula of circle .The length base of the right triangle is (x-h) units.And the length of the right triangle is (y-k) units .And that's the required lengths of the legs.Therefore correct options are fourth and last options .