Changes

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.   

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]''']]

=== Objectives ===

=== Objectives ===

*Recognize elements of triangle

*Recognize elements of triangle

*Introduce  concepts of exterior angle.

*Introduce  concepts of exterior angle.

===Estimated Time===

===Estimated Time===

30 minutes

30 minutes