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**CSS General Science & Ability Paper 2016**

**Q.No.10 (a)** Define and draw the following:

**(a)** Right-angle Triangle

**(b)** Equilateral Triangle

**Answer**

A triangle is a closed geometric shape with three interior angles and three sides. The sum of the three interior triangles is always 180° of every type of triangle.

**(a) Right-Angle Triangle**

Right-angle Triangle is triangle where one of its interior angles is of 90°. And, the sum of the remaining two interior angles is also 90° to make a total of 180°.

Here, A + B = 90°

**(b) Equilateral Triangle**

An Equilateral Triangle is a triangle where all the three sides of a triangle have the same length, and all the three interior angles are of 60° each.

The three sides have the same length “a”.