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  • A triangle is a simple closed curve made up of three line segments.

It has three vertices, three sides and three angles.

  • Triangles can be classified on the basis of their sides as:
    1. Scalene – No side of the triangle is equal
    2. Isosceles – Exactly two sides of the triangle are equal
    3. Equilateral – All the sides of the triangle are equal
  • On the basis of angles, triangles can be classified as:
    1. Acute-angled – All the angles of the triangle are less than 90°
    2. Obtuse-angled – Any one of the angles of the triang…

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