Parallelogram. Another 2-dimensional shape that we easily recognise, but can't always remember its name.

It has opposite parallel sides, which may help with remembering the name.

What **examples** can you think of that we see in everyday life?

Probably not so obvious to think about.

Believe it or not, you can be two things at once!

For example, a **square** has two sets of parallel sides, so is also a **parallelogram** but we call it a **square**. The same goes for a** rectangle**.

Basically a parallelogram is a **four-sided shape with their opposite sides equal in length** (the same as a square or rectangle).

Mathematicians can be awkward and make a four-sided look different just for fun, so that's how we arrive at parallelogram.

There are all sorts of reasons we may need to know the area of a parallelogram

Before we can do any of this there is one thing we need to know and that is **how** to find the area of a parallelogram.

First of all, we know that the sides of a parallelogram are not all the same length.

Two sides will have one length and the other two sides a different length.

As with a lot of shape work, there is a formula that you need to learn. So here goes:

Area of a parallelogram =base x height

You may recognise that it is the same as the formula for the area of a square and a rectangle.

Find the area of the parallelogram below.

Area = base x height

**Hang on!! **We **cannot **work out the area of the parallelogram above as we** only know the slanted height!**

Let's try this one instead.

Look out! You need to work with the vertical height, not the slanted height.

12 x 5 = 60 cm²

As we are working with area units are always squared. e.g cm² m²

What a bargain - one formula for three shapes.