Solve for any side of a right triangle with the classic a^2 + b^2 = c^2 relationship.
Last updated: March 2026 | By ForgeCalc Engineering
Calculation Steps
a^2 + b^2 = c^2
The theorem states that in a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides.
Example: a = 3 and b = 4 gives c = 5.
Which side is the hypotenuse?
The hypotenuse is the longest side, opposite the right angle.
Can this solve for a or b?
Yes. Leave either a or b blank to solve for that leg.
Does this accept decimals?
Yes. Any positive finite values are accepted.
What if the hypotenuse is too small?
The triangle is invalid if the hypotenuse is not larger than the other side.
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