Pythagorean Theorem Calculator
Calculate the hypotenuse, area, perimeter, and angles of a right triangle. Adjust the legs (a and b) with the sliders — the rest updates instantly.
Step 1: Leg lengths
3.0
4.0
a² + b² = c²
The Pythagorean theorem states that in a right triangle, the square of the hypotenuse (c) equals the sum of squares of the other two sides.
Step 2: Display options
3‑4‑5 triangle example
Legs 3 and 4 give hypotenuse 5. Area = 6, perimeter = 12, angles ≈ 36.87° and 53.13°.
Right triangle solution
Triangle results
Step‑by‑step
Diagram
Hypotenuse (c)
5.00
length of side c
Area
6.00
Perimeter
12.00
Angle A (opposite a)
36.87°
Angle B (opposite b)
53.13°
Step‑by‑step calculation
| Step | Operation | Result |
|---|
Triangle sketch
Sides are scaled to fit canvas. Right angle at corner C.
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