For a right-angled triangle, follow these steps to calculate the length of a side, x, when another side and an angle Ɵ is given: Label the two sides that contain information in the diagram with ...

The hypotenuse of a right triangle is the triangle's longest side; the side opposite the right angle. The length of the hypotenuse of a right triangle can be found using the Pythagorean theorem ...

In other words, the square on the hypotenuse is equal to the sum of the squares on the triangle’s two legs. Pythagoras came to believe that the same relationship would hold when the legs have ...