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.

Video Examples: Trapezoids : Isosceles Triangle


Example of Isosceles Triangle

       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?
     example of      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.