In this activity, we will learn how to calculate the volume of a prism.

A prism is a:

**3D shape which has the same cross-section running through it.**

If we sliced it anywhere along the cross-section we would get the same shape as the ends.

The volume is how much room it takes up inside!

To find it we **multiply the area of the cross-section by the length.**

Let's try a question!

__Example__

Calculate the volume of the pentagonal prism:

**Answer**

The cross-section is a pentagon.

That means if we slice it, the slices would be pentagons all the way through!

**Volume = Area of cross-section x length**

**Volume = 40 x 15**

**Volume = 600 cm ^{3}**

Let's do some questions!