Types of triangles based on angles

Objectives
Recognize the triangles based on the measures of the sides

Prerequisites/Instructions, prior preparations, if any
Prior knowledge of point, lines, angles, elements of triangle

Materials/ Resources needed

 * Digital : Computer, geogebra application, projector.
 * Non digital : Worksheet and pencil.
 * Geogebra files : “6. Types of triangle by angle.ggb”

Process (How to do the activity)
Evaluation at the end of the activity
 * 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.
 * Are children able to recognize the types of triangles based on the angles in a triangle.