Circumference is a fancy word that just means the perimeter, or the outside, of a circle. There are two versions of the same relatively simple formula that we can use here and we will show you how in this next video!

The area of a circle relates to the size of the inside. We only have one formula to use here however we also need to be aware of our BIDMAS that we have practiced before.

Arc length relates to a smaller part of the full circumference. The previous work on the circumference will be used here with a slight adjustment to allow for the fact that we do not have the whole circle!

In a very similar way to our last arc length video we now do the exact same thing but with area. This means we use our area formula combined with the same process as before.

Similar shapes means that the shapes are proportionally exactly the same. We need to find a scale factor, which basically means how much bigger is one than the other. If you don't know the scale factor off the top of your head we can divide the bigger shape by the smaller shape.

With more complex similar shapes we need to find a whole set of scale factors - Length, Area and Volume. Once we have these we apply the same process as before.

Surface Area involves combining the size of each individual area. We need to make sure that we find every area possible - even ones that we can't necessarily see!

For volume of a prisms we find the cross sectional area and then multiply this by the length of the prism. Depending on the shape of the prisms we may use different methods to find the area.

As soon as we see parallel lines we should be thinking of our corresponding, alternate and vertically opposite angles. You may have learnt this as Z,F and X angles.

When talking about the interior angles of any shape we have one simple equation. It works for all 2D shapes. When we know what the angles add up to we can either divide if the shape is regular or form an equation for us to solve.

The following worksheet will revisit all of the skills you have practiced throughout this block. This is a good chance to see where your shape work is at and to get feedback on what may be worth recapping! Try and answer each question to the best of your ability, and if you need reminding you can watch the videos above. Good luck!