About the Right Triangle Area
For a right triangle, the two sides forming the 90 degree angle are the base and height.
The area is half the product of the two perpendicular legs.
The hypotenuse is calculated separately from the Pythagorean theorem.
Calculate the area of a right triangle from its two perpendicular legs. The calculator also finds the hypotenuse using the Pythagorean theorem.
For a right triangle, the two sides forming the 90 degree angle are the base and height.
The area is half the product of the two perpendicular legs.
The hypotenuse is calculated separately from the Pythagorean theorem.
| First Perpendicular Leg | 3 cm |
| Second Perpendicular Leg | 4 cm |
| Triangle Area | 6 |
| Hypotenuse | 5 |
| Valid Input | 1 |
With legs 3 cm and 4 cm, the area is 6 square centimetres and the hypotenuse is 5 cm.
Try this example →Enter the two sides that meet at the 90 degree angle.
Area equals one half times the first leg times the second leg.
This calculator is designed for the two perpendicular legs. If you have different information, use the appropriate triangle calculator.
It is a right triangle with legs 3 and 4 and hypotenuse 5.