Calculators · Geometry and mensuration
Triangle: Pythagoras and area
The hypotenuse or a leg of a right triangle, and the area from base and height or from three sides (Heron).
Hypotenuse c = 13
The working
- Pythagoras: c² = a² + b² = 5² + 12² = 25 + 144 = 169.
- c = √169 = 13.