Question

what is triangle?What are the types?

Answer 1

Triangle : It is a polygon with 3 sides.

There are 3 kinds of triangle on the basis of sides —

♦ Equilateral Triangle : This triangle has all sides with equal length.
e.g. In triangle ABC,
AB = 2cm, BC = 2cm & Ac = 2cm

♦ Isosceles Triangle : This triangle has 2 sides with equal length, the third side is different from others.
e.g. In triangle ABC
AB = 5cm, AC = 5cm & BC = 3cm

♦ Scalene triangle : This triangle has no sides with equal length. In this triangle all the sides are of different length.
e.g. In triangle ABC
AB = 3cm, BC = 5cm, AC = 2cm

There are 3 kinds of triangles on the basis of angles —

♦ Acute angle triangle : This triangle has all the angles below 90° and above 0°.
e.g. Angle-A = 80°, Angle-B = 60° & Angle-C = 60°

♦ Right angle triangle : This triangle has any one angle with 90°.
e.g. Angle-A = 60°, Angle-B = 90° & Angle-C = 65°

♦ Obtuse angle triangle : This triangle has any one or two angle with above 90° and below 180°.
e.g. Angle-A = 70°, Angle-B = 110° & Angle-C = 85°

Some facts about triangles :

♦ Each angle of an equilateral triangle is 60°.

♦ The angle opposite to equal sides of an isosceles triangle are equal.

♦ A scelene triangle has no angles equal with another.

$i \: hope \: this \: answer \: helps \: you$

Answer 2

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What is Triangle?

• Triangle is a closed figure which has three sides, three vertices and three angles.
• The sum of three angles of a triangle is equal to the 180 degree.

How many types of triangle?

There are three types of triangle on the basis of sides are:

• (1) Scalene Triangle
• (2) Isosceles Triangle
• (3) Equilateral Triangle

There are three types of triangle on the basis of angles are:

• (1) Acute Angled Triangle
• (2) Right Angled Triangle
• (3) Obtuse Angled Triangle

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