Pythagorean Theorem Calculator

Find the missing side of a right triangle using a² + b² = c², where c is the hypotenuse.

Find Missing Side

a
3
b
4
c (hypotenuse)
5
c = √(3² + 4²) = 5

Verify a Right Triangle

Enter all three sides to check if they form a right triangle.

✓ This is a valid Pythagorean triple.
a² + b² = 25  |  c² = 25

Results

PropertyValue
Leg a3
Leg b4
Hypotenuse c5
Angle A36.86989765°
Angle B53.13010235°
Angle C90°
Perimeter12
Area6

Common Pythagorean Triples

abc
345
51213
81517
72425
202129
94041
116061
284553
335665
367785