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From Karnataka Open Educational Resources
→Activity No # 5 : Types of triangles based on sides
# Scalene triangles are triangles in which none of the sides are the same length.
# Scalene triangles are triangles in which none of the sides are the same length.
=== '''Activity No # 5 : Types of triangles based on sides''' ===
* '''Objectives'''
# Recognize the triangles based on the measures of the sides
* '''Pre-requisites'''
# Prior knowledge of point, lines, angles, elements of triangle
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil.
# Geogebra files : “5. Types of triangle by sides.ggb”
* '''How to do'''
# 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.
* '''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.
=== Activity No # 6 : Types of triangles based on angles ===
* '''Objectives'''
# Recognize the triangles based on the measures of the sides
* '''Pre-requisites'''
# Prior knowledge of point, lines, angles, elements of triangle
* '''Resources needed'''
# Digital : Computer, geogebra application, projector.
# Non digital : Worksheet and pencil.
# Geogebra files : “6. Types of triangle by angle.ggb”
* '''How to do'''
# Identify the angle types in the triangle.
# Can the angles in the triangle be of different type – obtuse or right angle.
# Establish the types of triangles based on the types of angles that form the triangle – when all angles are acute angles, when one of the angle is a right angle and when one of the angle is obtuse angle.
# Is it possible to have a triangle with two right angle or two obtuse angle. Why or why not?
# What kind of a triangle is formed when all the angles are equal? For what measure of the angle such a triangle is formed?
# Can a triangle be formed with a reflex angle.
# Measure the angles for different triangle, recognize the types of angles and conclude the type of triangle.
* '''Evaluation at the end of the activity'''
# Are children able to recognize the types of triangles based on the angles in a triangle.
== Concept 3: Angle Sum Property ==
=== '''Activity No # 7 :Angle sum property''' ===
