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

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
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Evaluation at the end of the activity
 * Sl No.
 * Angle ABC
 * Angle DEF
 * Angle ABC + Angle DEF
 * Angle O
 * Is the sum of two angles greater than Angle O
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