Adjacent angles

Name of the activity

Brief blurb describing what the activity. If this has been borrowed from some external web site (for example, a non OER or OER site which had this idea and based on which the activity was developed)

Objectives

Introduce children to concept of adjacent angles

Estimated Time

20 minutes

Prerequisites/Instructions, prior preparations, if any

Prior knowledge of point, lines, angles

Materials/ Resources needed

• Digital : Computer, geogebra application, projector.
• Non digital : Worksheet and pencil.
• Geogebra files : Adjacent angles.ggb

Download this geogebra file from this link.

Process (How to do the activity)

• Prior hands on activity (optional – children can use news paper strips to form angles and place them together and notice the resulting angle formed).
• Change the measure of the angles – angle1 and angle 2 using the slider
• If the two angles are place next to each other , what will be formed
• Use the slider to place the angles next to each other
• What is the resulting angle formed due to the two angles
• What is the measure of the angle formed when the two are placed to each other
• Is there any other way to make the two angles adjacent
• Record the values of the two angles and their sum in the worksheet

Sl No.	Angle ABC	Angle DEF	Angle ABC + Angle DEF	Angle O	Is the sum of two angles greater than Angle O
.

Evaluation at the end of the activity