Use the formula perimeter P = 2 x (length + width) to calculate the perimeter of rectangles
Home / 5th grade / Algebra / Formulae: perimeter / Perimeter of rectangles
To calculate the perimeter of a rectangle, you need to add up the lengths of all four sides. The formula is:
Perimeter = 2(length) + 2(width)
For example, if the rectangle has a length of 10 units and a width of 5 units, the perimeter would be:
Perimeter = 2(10) + 2(5) = 20 + 10 = 30 units
Another example, if the rectangle has a length of 12 metres and a width of 8 metres, the perimeter would be:
Perimeter = 2(12) + 2(8) = 24 + 16 = 40 metres
Use a slow game like 4 in a row to practice this topic first, then when you get into a timed game like Pong, you will have had enough practice to be able to work out the questions really fast!
Below is a table showing the first 5 question answer pairs for the topic "Perimeter of rectangles" as used in the lessons for this topic. Our games and tests for the topic use these 5 items plus 9 additional question answer pairs.
The topic "Perimeter of rectangles" is in the category Algebra for 5th grade (ages 10 to 11).
Home / 5th grade / Algebra / Formulae: perimeter / Perimeter of rectangles
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