Introduction

A closed figure with three sides is called a Triangle. It has three vertex, sides and Angles.

Types of Triangle

1. There are three types of triangles on the basis of the length of the sides.

Name of TrianglePropertyImage
ScaleneLength of all sides are differentThis image has an empty alt attribute; its file name is image-57.png
IsoscelesLength of two sides are equalThis image has an empty alt attribute; its file name is image-58.png
EquilateralLength of all three sides are equalThis image has an empty alt attribute; its file name is image-59.png

2. There are three types of triangles on the basis of angles.

Name of TrianglePropertyImage
AcuteAll the three angles are less than 90°This image has an empty alt attribute; its file name is image-60.png
ObtuseOne angle is greater than 90°This image has an empty alt attribute; its file name is image-61.png
RightOne angle is equal to 90°This image has an empty alt attribute; its file name is image-62.png

Congruence

If the shape and size of two figures are same then these are called Congruent.

1. Two circles are congruent if their radii are same.

2. Two squares are congruent if their sides are equal.

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