Pythagorean theorem: find a missing leg
Apply the Pythagorean theorem to find a missing leg of a right triangle. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
Try one
A right triangle has a hypotenuse of 13 m and one leg of 12 m. How long is the other leg?
a2 + b2 = c2
Answer: 5
See one solved, step by step
A right triangle has a hypotenuse of 25 m and one leg of 24 m. How long is the other leg?
a2 + b2 = c2
📘 Worked solution
1252 - 242 = 625 - 576 = 49Rearrange the Pythagorean theorem: the missing leg's square is c^2 minus the known leg's square.
2√(49) = 7Take the square root to get the length.
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