Question

Define triangle and write the types of triangle on the basis of sides and angles. ​

Answer 1

A triangle is a three-sided polygon that consists of three edges and three vertices

On the basis of length of the sides, triangles are classified into three categories:

1. Scalene Triangle
2. Equilateral triangle
3. Isosceles Triangle

On the basis of measurement of the angles, triangles are classified into three categories:

1. Acute Angle Triangle

    2. Right Angle Triangle

    3. Obtuse Angle Triangle

Answer 2

Answer:

A triangle (denoted as ∆) is a 2D polygon with three edges and vertices.

$\underline{\fbox{\rm{Types \: of \: Triangle:}}}$

Triangle are classified on the basis of sides and angles.

On the basis of Sides :

1. Equilateral triangle : A triangle whose all 3 sides are equal in length.
2. Isosceles triangle : A triangle whose 2 sides are equal in length.
3. Scalene triangle : A triangle whose all 3 sides are of different length.

On the basis of Angles :

1. Acute angle triangle : A triangle whose one angle is smaller than 90°. (<90°)
2. Right angle triangle : A triangle whose one angle is 90°.(=90°)
3. Obtuse angle triangle : A triangle whose one angle is greater than 90°.(>90°)