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Easy: Area with unit squares
To find the area, split the figure into two rectangles, find the area of each and add. To find the perimeter, first work out the two unlabelled sides from the sides you know: the top and the step together match the bottom, and the two right-hand pieces together match the left side. Then add all six sides.
Find the area or perimeter of each figure.
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Split it into two rectangles with one line, find each area, and add them. Different ways of splitting give the same total.
The unlabelled sides can be worked out from the others: opposite sides of the whole shape add up. Finding them first is the key step for the perimeter.
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