Changes

*How many angles are formed when three lines intersect with each other?

*How many angles are formed when three lines intersect with each other?

*How many angles are enclosed by the triangle?

*How many angles are enclosed by the triangle?

 

'''Evaluation at the end of the activity'''

==== '''Evaluation at the end of the activity''' ====

* Can there be a closed figure with less than three sides?

* Can there be a closed figure with less than three sides?

* Can the vertices of the triangle be anywhere on a plane?

* Can the vertices of the triangle be anywhere on a plane?