﻿ Definition and examples isosceles triangle | define isosceles triangle - geometry - Free Math Dictionary Online

# Isosceles Triangle

## Definition of Isosceles Triangle

When the two sides of a triangle are equal, then the triangle is called as an Isosceles Triangle.

### More About Isosceles Triangle

• The diagonals of an Isosceles Triangle are equal.
• In an isosceles triangle, the two angles are equal.

### Example of Isosceles Triangle

△ABC is an isosceles triangle as sides AB and AC are equal and also ∠ABC and ∠BCA are equal.

### Solved Example on Isosceles Triangle

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

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

### Solution:

Step 1: A triangle with two equal sides is known as an isosceles triangle.
Step 2: Among the figures shown, the figure 3 has two equal sides.
Step 3: Therefore, figure 3 is an isosceles triangle.

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