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To be able to calculate the perimeter of 2-D shapes.
Make sure to look at the unit of measure.
If we have a rectangular shape we can use 2 different methods to work out the perimeter.
Method 1
First, we find out the length of each side of a shape.
We then add all of the lengths together.
Method 2
Find the length of the 2 perpendicular sides.
Then, add these together.
Finally, multiply by 2 (double).
Some shapes suit different methods.
If the shape is a rectangle, method 2 might be the quicker option.
However, if the shape is different in shape method 1 may be quicker.
Complete the task ‘Perimeter 2’ on Seesaw.