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**Geometry**

## Types of Triangles for Class 5 Math

There are different types of triangles in mathematics. Here students will learn about the different types of triangles.

In this learning concept, the students will also learn to

- Classify types of triangles based on sides.
- Identify types of triangles on the basis of angles.
- Evaluate types of triangles and their properties.

Each concept is explained to class 5 maths students using illustrations, examples, and mind maps. Students can assess their learning by solving the two printable worksheets given at the pageâ€™s end.

Download the class 5 maths types of triangles worksheet and check the solutions to the types of triangle questions for class 5 provided in PDF format.

## How Many Types of Triangles Are There?

- A triangle is a two-dimension closed figure.
- It has three sides and three interior angles.
- The point where two sides intersect each other is called the vertices of the triangle.
- A triangle has three vertices.

## Types of Triangles

## 1. Types of Triangles Based on Sides:

A triangle is of three types:

- Equilateral triangle
- Isosceles triangle
- Scalene triangle

## Equilateral Triangle

In an equilateral triangle, the length of all the sides of the triangle is equal.

## Isosceles Triangle

In an isosceles triangle, the length of any two sides of the triangle is equal.

## Scalene Triangle

In a scalene triangle, the length of all the sides of the triangle is unequal.

## 2. Types of Triangles on the Basis of Angles:

There are three types of triangles:

- Acute angled triangle
- Obtuse angled triangle
- Right-angled triangle

## Acute angled Triangle

When each of the angles of a triangle is less than 90Â° is called an acute-angled triangle or acute triangle.

## Obtuse angled Triangle

When any one of the angles of a triangle is more than 90Â° is called an obtuse-angled triangle or obtuse triangle.

## Right angled Triangle

When any one of the angles of a triangle is equal to 90Â° is called a right-angled triangle or right-angled triangle or right triangle.

## 3. Types of Triangles and Their Properties:

## Angles in Triangle

- There are three angles in a triangle.
- The sum of the angles of a triangle is equal to 180Â°.

The sum of the angle = 45Â° + 90Â° + 45Â° = 180Â°

Therefore, the given figure is a triangle.

The sum of the angle = 75Â° + 56Â° + 88Â° = 219Â°

Therefore, the given figure is not a triangle.

## Find the Missing Angle:

### Example:

Find the missing angle of the given triangle

Solution:

The sum of the given angles = 60Â° + 70Â° = 130Â°

The total angle of the triangle = 180Â°

Missing angle = 180Â° â€“ 130 Â°

= 50Â°