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Three lines intersect with each other in a plane to form a closed figure. Vertices are formed at the intersecting points and edges that mark the triangle are sides. [[File:Triangle formation.png|thumb|600x600px|'''[https://ggbm.at/z4h42k8z Introduction to a triangle.ggb]''']]
Three lines intersect with each other in a plane to form a closed figure. Vertices are formed at the intersecting points and edges that mark the triangle are sides.
=== Objectives ===
=== Objectives ===
*Understand formation of triangles
*Understand formation of triangles
*Non digital : Worksheet and pencil
*Non digital : Worksheet and pencil
*Geogebra files : '''“[https://ggbm.at/z4h42k8z Introduction to a triangle.ggb]”'''
*Geogebra files : '''“[https://ggbm.at/z4h42k8z Introduction to a triangle.ggb]”'''
{{Geogebra|https://www.geogebra.org/m/prvUJHb5}}
===Process (How to do the activity)===
===Process (How to do the activity)===