Calculate the area and perimeter of a right triangle using the side lengths or the angle measures. Learn the formulas, examples, and special cases of 30°-60°-90° and 45°-45°-90° triangles. In a right angle triangle , if one arm is taken as the base then the other is height, so the area of a right triangle is one-half the product of the two arms. Therefore, the formula of the right-angle triangle is mentioned below: A =1/2 ab Where a and b are the sides of a triangle which is a base and the height of a triangle . The sum of the three interior angles in a triangle is always 180 degrees. The most common types of triangles that we study are equilateral, isosceles, scalene and right - angled triangles . In this section, we will talk about the right triangle formula , also called the right - angled triangle formulas. A right-angled triangle is a triangle , that has one of its interior angles equal to 90 degrees or any one angle is a right angle . Therefore, this triangle is also called the right triangle or 90-degree triangle . The right triangle plays an important role in trigonometry. Let us learn more about this triangle in this article.
