The perimeter is the distance around the outside of a 2D shape.
We’ve spent the last week calculating the perimeter of 2D shapes.
There are a few different ways to do this…
- If we know the shape has equal length sides, we can multiply one length by how many sides the shape has.
- If the shapes are drawn on grids, we can use the squares to count the perimeter. Be careful not to include the corner squares!
- If asked to, we can use our rulers to measure the length of each side and add them together.
We tried to choose the most efficient methods to find the perimeter. For example, when each side is equal length, using multiplication to help us!
Help at home by answering this question:
