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→Materials/ Resources needed
*Non digital : Worksheet and pencil.
*Non digital : Worksheet and pencil.
*Geogebra files :
*Geogebra files :
*#'''“[https://ggbm.at/wjdsrz4w a. Angles in a right triangle.ggb]” ,'''
*#'''“[https://ggbm.at/n8xcdff9 a. Angles in a right triangle.ggb]” ,'''
*#'''“[https://ggbm.at/a2jjgpkn b. Angle sum property proof.ggb]” ,'''
*#'''“[https://ggbm.at/zwcggpwg b. Angle sum property proof.ggb]” ,'''
*#'''“[https://ggbm.at/fskbjzxj c. Angle sum property of a triangle.ggb]”'''
*#'''“[https://ggbm.at/HjfczzyE c. Angle sum property of a triangle.ggb]”'''
===Process (How to do the activity)===
===Process (How to do the activity)===
{{Geogebra|n8xcdff9}}
*Use the file - “[https://ggbm.at/wjdsrz4w a.Angles in a right triangle.ggb]”
*Use the file - “[https://ggbm.at/wjdsrz4w a.Angles in a right triangle.ggb]”
*Ask students what is the kind of triangle they observe.
*Ask students what is the kind of triangle they observe.
*Students should be able to recognize the alternate angles formed. Is the alternate angle same as one of the angles of the triangle.
*Students should be able to recognize the alternate angles formed. Is the alternate angle same as one of the angles of the triangle.
*So what can you say about the all the angles of the triangle?
*So what can you say about the all the angles of the triangle?
{{Geogebra|zwcggpwg}}
*With the file - “[https://ggbm.at/a2jjgpkn b. Angle sum property proof.ggb]”
*With the file - “[https://ggbm.at/a2jjgpkn b. Angle sum property proof.ggb]”
*Draw a line perpendicular to a side passing through the opposite vertex. How many triangles are formed. What kinds of triangles are formed?
*Draw a line perpendicular to a side passing through the opposite vertex. How many triangles are formed. What kinds of triangles are formed?
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{{Geogebra|HjfczzyE}}
*With the file – “[https://ggbm.at/fskbjzxj c. Angle sum property of a triangle.ggb]”
*With the file – “[https://ggbm.at/fskbjzxj c. Angle sum property of a triangle.ggb]”
*Ask students what happens when the three angles of the triangle are placed adjacent to each other.
*Ask students what happens when the three angles of the triangle are placed adjacent to each other.