Question

Find the length of diagonal AV in a three dimensional figure.​

Answer 1

Although I'm going to answer this question, I have to point out that this problem is NOT stated clearly. The problem being we don't know if angle AMV is a right angle.

But I'm assuming it is and thus we need to use the Pythagorean theorem.

AV=$\sqrt{5^2+12^2}$

AV=13

Therefore answer is C. :D