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Isosceles Right Triangle

Definition Of Isosceles Right Triangle

A right triangle in which two sides and two angles are equal is called Isosceles Right Triangle.

More About Isosceles Right Triangle

In an isosceles right triangle, the angles are 45°, 45°, and 90°.
Isosceles right triangle satisfies the Pythagorean Theorem.
The length of the hypotenuse in an isosceles right triangle isIsosceles right triangle times the side's length.

Video Examples: How to solve the Right Isosceles triangle? 45-45-90


Example of Isosceles Right Triangle

 example of     Isosceles Right Triangle

The given figure is an isosceles right triangle as the sides AB and BC are equal in length and angle B is a right angle.

Solved Example on Isosceles Right Triangle

Ques: Which of the following is an isosceles right triangle? 

 example of     Isosceles Right Triangle


A. Figure 3
B. Figure 1
C. Figure 4
D. Figure 2
Correct Answer: D


Step 1: An isosceles right triangle has two sides equal and measure of one of its angles is 90°.
Step 2: Here, Figure 2 is an isosceles right triangle.