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Module · Math · Geometry
Pythagorean Theorem
Solve any right-triangle problem: given two of the three sides, find the third using a² + b² = c².
Solve for
Result
C =
5
c = √(a² + b²) = √(9 + 16) = √25
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Guide
How Pythagorean Theorem works
Step 01
Pick which side to solve for
a, b or c (hypotenuse).
Step 02
Enter the other two
Both positive values.
Step 03
See answer + steps
Formula and intermediate calculation shown.
FAQ
Frequently asked
Formula?+
a² + b² = c². Applies only to right triangles.
What if the answer is 'invalid'?+
You provided c ≤ b (or c ≤ a) — the hypotenuse must be longer than either leg.