With 2D shapes we were interested in measuring:

- Area; and
- Perimeter.

With 3D solids we are interested in measuring:

- Volume; and
- Surface Area.

What is the difference between these two things?

**Prisms**

We will start by considering **prisms** and **cylinders**.

What is the difference between these two things? What is the same about them?

How do we find their volume? How do we find their surface area?

Let’s try calculating some with the teacher.

**Exercise**

Let’s complete exercises 23 and 24 from pages 31 to 33 of the core textbook:

The answers are below: