# Right Angle Calculator

Right Angle Calculator checks whether the given triangle is a right angle for the given sides. A right angle is defined as an angle with a value equal to 90 degrees.

## What is the Right Angle Calculator?

Right Angle Calculator is an online tool that helps to check whether the given triangle is a right angle for the given sides. This online right angle calculator helps you to check whether the given triangle is a right angle in a few seconds. To use this right angle calculator, enter the sides of the triangle in the given input box.

## How to Use Right Angle Calculator?

Please follow the steps below to check whether the given triangle is a right angle using an online right angle calculator:

**Step 1:**Go to Cuemath’s online right angle calculator.**Step 2:**Enter the sides of the triangle in the given input box of the right angle calculator.**Step 3:**Click on the**"Check"**button to check whether the given triangle is a right angle.**Step 4:**Click on the**"Reset"**button to clear the fields and enter new values.

## How Right Angle Calculator Works?

To check whether the given triangle is a right angle, it should satisfy the Pythagoras theorem. Pythagoras derived an important formula for a right triangle. The formula states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

(Hypotenuse)^{2} = (Base)^{2} + (Altitude)^{2}

Let us understand this with the help of the following example.

**Solved Example on Right Angle**

Check whether the triangle is a right angle if the hypotenuse is 5 units and base of the triangle is 4 units and the altitude of the triangle is 3 units and verify it using the right angle calculator?

**Solution**:

Given: Hypotenuse = 5 units, the base of the triangle = 4 units, and the altitude of the triangle = 3 units

To check the given triangle is a right angle, it should satisfy (Hypotenuse)^{2} = (Base)^{2} + (Altitude)^{2}

(5)^{2} = (4)^{2} + (3)^{2}

25 = 16 + 9

25 = 25

Therefore, the given triangle is right angle.

Now, try the right angle calculator and check for:

- Hypotenuse = 19 units, the base of the triangle = 15 units, and the altitude of the triangle = 13 units
- Hypotenuse = 10 units, the base of the triangle = 6 units, and the altitude of the triangle = 8 units