Isosceles Triangle

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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.

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