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Source: IT for Change
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=== Objectives ===
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To verify vertically opposite angles are equal
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=== Estimated Time ===
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20 minutes
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=== Prerequisites/Instructions, prior preparations, if any ===
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Knowledge about point, line, angle
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=== Materials/ Resources needed ===
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Digital: Click here to [[:File:Intersection of two lines.ggb|open]] the file
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Non-digital: Paper, pencil, ruler, compass, protractor
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===Process (How to do the activity) ===
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{{Geogebra|haaj2yr5}}'''Procedure :'''
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# What are intersecting lines?
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# Identify two lines cross each other in a plane i.e. lines 'g' and 'f' intersect at point 'A'
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# Identify intersecting lines (two or more) meet only at one point always and also can cross each other at common vertex (which is the point of intersection).
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# Identify the angles formed at common vertex 'A'
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# Identify two pairs of opposite angles
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# What is the vertically opposite angle?how many pair of vertically opposite angles are formed?
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# Identify and measure vertically opposite angles?What is your conclusion?
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# Can vertically opposite angles be adjacent?
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# How many pairs of adjacent angles are formed?
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# Idenify and measure adjacent angles?What is your conclusion?
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=== Evaluation at the end of the activity ===
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# Can two lines cross at two points?
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# If out of two angles of linear pair one is 60°, then what is the measure of other angle?
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# If two angles are vertically opposite angles, where the measure of one of the angles is 30°, then what is the measure of other angle?
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Go back - [[KVS Lines and Angles|click here]]
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[[Category:Lines and Angles]]
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===Evaluation at the end of the activity===
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[https://karnatakaeducation.org.in/KOER/en/images/6/67/Worksheet_2_-_Angles_formation_and_its_types.pdf Worksheet 2 - Angles formation and its types.pdf]