**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 page’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 90° is called an acute-angled triangle or acute triangle.

####

**Obtuse angled Triangle**

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

####

**Right angled Triangle**

When any one of the angles of a triangle is equal to 90° 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 180°.

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

Therefore, the given figure is a triangle.

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

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 = 60° + 70° = 130°

The total angle of the triangle = 180°

Missing angle = 180° – 130 °

= 50°