**Triangles** are very important to understand as knowledge of Triangles is tested in most of the major academic and competitive exams.

Triangle is one of the polygons as it is a closed shape made up of line segments. Triangles are three-sided shapes.

There are two types of triangles - Scaler, Isosceles, right Triangle.

**Isosceles Triangles***(45-45-90 Triangle)*- These triangles have**two sides equal**.**Equilateral Triangles***(30-60-90 Triangle)*- These triangles have**all sides equal**.

Properties of a triangle -

1. The sum of all three angles of a triangle is equal to 180 degrees.

2. Sum of any two sides is always more than the length of third side.

3.

Pythagorean Theorem / Pythagorous Theorem for Triangles-

a^{2} + b^{2} = c^{2}

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