Prisms

A prism is a 3-D object. It has identical shapes at

each end which are joined together with flat sides.

We made prisms. We started with a 2-D shape then built sides and a matching end. We used straws and playdough. It was tricky so we switched to straws and

masking tape!

We made cubes. Cubes have __ edges

and __ faces.

We made triangular prisms. They have ___ edges and ___ faces.

They are made with 2 ________ and 3 __________.

We made rectangular prisms. It has___ edges and ___ faces. It is

made with 2 ________ and 4 __________.

We made pentagonal prisms. They have ___ edges and ___ faces. They are made with 2

________ and 5 __________.

We made hexagonal prisms. They have ___ edges and ___ faces.

They are made with 2 ________ and 6 __________.

Emily made a pyramid. A pyramid has a square base and

four triangles.

QUESTIONS:1. These are 3D objects but they are not actually prisms.

Do you know why?

2. Is a pyramid a prism? Why or why not?3. Which prism in the slideshow has the most edges?

The most faces? Do you notice any patterns between the number of edges and the number of faces?

4. Which prism do you see most in your everyday life? Think of some examples.