Use this ppt for a class activity to instruct the children to make a tessellating shape. Ask children to make one shape each and ask them to stick all the fish tesslating shapes on a chart paper. Display it on the bulletin board.

This presentation is to understand the concepts of Progressions easily. There is an explanation with examples. And there are proofs of formulas.

You can use this for class presentation to introduce the volume of prisms.

You can use this as presentation in the class for introducing the volume of prisms.

Simplifying

Proof of midline segment of a trapezoid