# Find the area of a right triangle

A rectangular triangle is a triangle in which one angle is right and is equal to 90 degrees. The relationship between the sides and angles of a right-angled triangle is at the heart of trigonometry. The area of such a triangle is calculated by the formula: the product of two legs divided by two.

**1st leg of a right triangle:**

**2nd leg of a right triangle:**

### Definitions

The side opposite to the right angle is called the hypotenuse.

Sides adjacent to a right angle are called legs.

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Rectangular triangles are of two types:

- When the legs are equal, then the triangle is called an isosceles right triangle
- If the lengths of all three sides of a right-angled triangle are natural numbers, then the triangle is called a Pythagorean triangle