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From Karnataka Open Educational Resources
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→Activity No 2 # Interior Angle Sum Property of a triangle
* Geogebra file on interior angle sum of a triangle, [https://www.ck12.org/assessment/tools/geometry-tool/plix.html?eId=MAT.GEO.407.01&questionId=546667e25aa4130310c1bed3&artifactID=1884324&backUrl=https%3A//www.ck12.org/geometry/triangle-angle-sum-theorem/%23interactive&plix_redirect=1 Lighthouse (ck-12 series)]
* Geogebra file on interior angle sum of a triangle, [https://www.ck12.org/assessment/tools/geometry-tool/plix.html?eId=MAT.GEO.407.01&questionId=546667e25aa4130310c1bed3&artifactID=1884324&backUrl=https%3A//www.ck12.org/geometry/triangle-angle-sum-theorem/%23interactive&plix_redirect=1 Lighthouse (ck-12 series)]
* '''Process (How to do the activity)'''
* '''Process (How to do the activity)'''
* Students are taken through an inductive process of constructing a triangle using sliders for length of sides and an angle
* Students are taken through an inductive process of constructing a triangle using sliders for length of sides and an angle. The angle slider is moved to generate different types of triangles. The interior angle sum of different types of triangles are compared.
* '''Developmental Questions (What discussion questions)'''
* '''Developmental Questions (What discussion questions)'''
* '''Evaluation (Questions for assessment of the child)'''
* '''Evaluation (Questions for assessment of the child)'''
