Nigel and Tatiana 3-D Shapes

One of these are just pyramids with different bases and the other are just prisms.

We learned that for prisms the number of vertices, edges and number of sides of Base were all multiples of the sides of base by two.

We know this because if we had to make a heptagonal prism it would have 7 sides from the base and 14 faces and 21 vertices. And this goes for pyramid but for prism it's multiplied by 3 not two.

We couldn't make a rectangular prism because we'd have to elongate a cube.