Look at the rectangle below:
Calculate its perimeter.
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Look at the rectangle below:
Calculate its perimeter.
Given that in a rectangle every pair of opposite sides are equal to each other, we can state that:
Now let's add all the sides together to find the perimeter of the rectangle:
34
Look at the rectangle ABCD below.
Side AB is 6 cm long and side BC is 4 cm long.
What is the area of the rectangle?
Perimeter is the distance around the outside of a shape (measured in units like cm). Area is the space inside a shape (measured in square units like cm²). For this rectangle, perimeter = 34 units, area = 70 square units.
Not necessarily! You can either add all four sides (10 + 7 + 10 + 7) or use the formula P = 2(10 + 7). Both methods give the same answer: 34.
By definition, a rectangle has four right angles and opposite sides that are parallel and equal. So the top and bottom sides are both 10 units, and the left and right sides are both 7 units.
You likely doubled the perimeter by mistake! The correct calculation is 2(10 + 7) = 2(17) = 34, not 2 × 2 × (10 + 7). Remember: only multiply by 2 once.
Think of it as "going around twice" - you walk the length once, the width once, then the length again, and the width again. So it's 2 times (length + width).
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