## Definition Of Triangle

A three-sided polygon is called to be a triangle

A Triangle is a polygon with three sides

Equilateral Triangle: A triangle with all the sides of same length is called equilateral triangle.
Isosceles Triangle: A three-sided polygon with at least two sides of the same length is called isosceles triangle.
Scalene Triangle: A three-sided polygon with no sides of the same length is called scalene triangle.
Right Triangle: A three-sided polygon with one right angle is called right triangle.
Acute Triangle: A triangle measuring all its angles less than 90o is called acute triangle.A three-sided polygon with all its angles less than 90o is called
acute triangle.
Obtuse Triangle: A triangle with one of its angle measuring more than 90o is called obtuse triangle.

### Examples of Triangle ### Solved Example on Triangle

#### Ques: A piece of land is in the shape of a triangle with the sides of length 5 m, 5 m and 3 m? What is this triangle called?

##### Choices:

A. right triangle
B. scalene triangle
C. isosceles triangle
D. equilateral triangle