# Types of triangles based on sides

Equilateral triangle, isosceles triangle and scalene triangle are different types of triangles that are formed with different measures of sides.

### Objectives

Recognize the triangles based on the measures of the sides

30 minutes

### Prerequisites/Instructions, prior preparations, if any

Prior knowledge of point, lines, angles, elements of triangle

### Process (How to do the activity)

• Students should recognize the elements of a triangle – sides and angles.
• What are the measures of the sides of a triangle, are the measurements of the sides equal or different.
• Establish that different triangles are formed with the different measures of the sides: when all sides are different, when any two sides are equal and when all sides are equal.
• Children can note the measures of the sides in the worksheet for different triangles to conclude the type of triangles based on the sides.
• Is the triangle formed for any measure of the sides. When does the triangle not form. What is the relation between the 3 sides for the triangle to be formed.
Observation Side 1 Side 2 Side 3 What can you say about sides? Type of triangle formed
Triangle 1
Triangle 2
Triangle 3
• Evaluation at the end of the activity
• Are children able to recognize the types of triangles when the sides are specified.
• Have children been able to conclude when a triangle is formed given the three sides.