Triangles

- 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:
- Scalene – No side of the triangle is equal
- Isosceles – Exactly two sides of the triangle are equal
- Equilateral – All the sides of the triangle are equal

- On the basis of angles, triangles can be classified as:
- Acute-angled – All the angles of the triangle are less than 90°
- Obtuse-angled – Any one of the angles of the triang…

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