Isosceles Right Triangle Hypotenuse c = a√2. Leg Hypotenuse 7.071 Step-by-step with your numbers: 1. Values used: 2. Leg = 5 3. Hypotenuse = 7.071 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! 45-45-90 triangle. FAQ Sides? Equal legs. Related calculators 45 45 90 Triangle Calculator Solve a 45-45-90 right triangle from a leg. Pythagorean Theorem Calculator Find the hypotenuse of a right triangle from the two legs. Right Triangle Calculator Solve a right triangle from its two legs.