Consider a right-angled triangle DABC. Hypotenuse2 Base2 Perpendicular2 It can be simply written as c2a2 b2. If you know the length of any 2 sides of a right triangle you can use the Pythagorean equation formula to find the length of the third side.
This theorem states that the square of the length of the hypotenuse will be equal to the sum of the squares of the lengths of the other two sides of the right-angled triangle.
The longest side of the triangle is called the hypotenuse so the formal definition is. You might recognize this theorem in the form of the Pythagorean equation. Let BD be perpendicular to the side AC. Use the Pythagorean theorem to calculate the value of X.