# How many triangles are there

As the topic suggests, “How many triangles are there“. This keyword does not specify whether you are asking about Triangle types or asking about counting the triangles in an image consisting of many triangles.

No need to worry; I will cover both topics and try to resolve your query.

So let’s start our discussion with Triangle.

Table of Contents

## What is triangle?

As the name suggests, “Triangle” is made up of tri + angle. “Tri” means three, and “angle” is used to show the inclination of one side with the other Triangle is a polygon that has three sides, and the sum of all the interior angles of the Triangle is 180.

## Types of triangle

There are different types of triangles but mainly we can divide them by their length of sides and angles.

• Scalene
• Isosceles
• equilateral

### Based on Angles

• Acute angled triangle
• Right Angled triangle
• Obtuse Angled triangle

So Mainly there are six types of trianlges.

Let us discuss more about them.

#### Types of triangles based on sides

Scalene: A triangle in which all the sides are of different length is known as a Scalene triangle. As the size of the sides is different, so the angles made by them are also different. So overall Scalene triangle, all three sides and angles are different.

Isosceles: In Isosceles, triangle lengths of two out of three sides are equal. So angle made by those two sides is also similar. It means the Isosceles triangle has two equal sides and two equal angles.

Equilateral: Equilateral triangle has all sides of equal length. So the angle made by them is also similar. It means an equilateral triangle has three equal sides and three equal angles.

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#### Types of triangles based on angles

Acute Angled Triangle: Triangle in which all the interior angles are less than 90 is called an acute-angled triangle.

Obtuse Angled Triangle: A triangle in which one of the interior angles is greater than 90 is called an obtuse-angled triangle.

Right Angled Triangle: A triangle in which one of the interior angles is equals to 90 is called a Right-angled triangle.

## Frequently Asked Questions

Answer: Three

##### How many types of triangles are there?

Answer: Mainly there are six types of triangles based on length and angles.

##### Triangle is a polygon or not?

Answer: Yes triangle is a polygon

Answer: 180