Recommended first: Unit test. You can still continue here.
Imagine a garden. The fence around it is the perimeter, and the grass inside is the area. Perimeter is measured in units like feet. Area is measured in square units, since it counts squares.
Work through it
A rectangle is 7 cm long and 3 cm wide. Find the perimeter.
Add all four sides.
Add. cm
Find the area of the same rectangle.
Multiply length by width.
It's counted in squares. square cm
Watch out for this
Adding only two sides for the perimeter.
A rectangle has four sides. You can double the sum: .
The short version
Perimeter: add every side. Area of a rectangle: length times width.
Perimeter: add every side. Area of a rectangle: length times width.
Your turn
Prefer paper? Print the Measurement and data worksheet, with an answer key.
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