** 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**

- In an isosceles triangle, the two angles are equal.

**Example of Isosceles Triangle**

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

**Solved Example on Isosceles Triangle**

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.

**Related Terms for Isosceles Triangle**

- Congruent
- Side
- Triangle