Look at the rectangle below.
Side DC has a length of 1.5 cm and side AD has a length of 9.5 cm.
What is the perimeter of the rectangle?
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Look at the rectangle below.
Side DC has a length of 1.5 cm and side AD has a length of 9.5 cm.
What is the perimeter of the rectangle?
Since in a rectangle every pair of opposite sides are equal to each other, we can state that:
Now we can add all the sides together and find the perimeter:
22 cm
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?
Because a rectangle has 4 sides total! Even though opposite sides are equal (AD = BC = 9.5 cm and AB = CD = 1.5 cm), you still need to count all 4 sides when finding perimeter.
Absolutely! P = 2(length + width) = 2(9.5 + 1.5) = 2(11) = 22 cm. This formula is actually faster than adding all four sides individually.
It doesn't matter! In this problem, you can call either measurement the length or width. The perimeter will be the same because you're adding both measurements twice.
No! The perimeter depends only on the side lengths, not how the rectangle is positioned or drawn. As long as the sides are 1.5 cm and 9.5 cm, the perimeter is always 22 cm.
Yes! Always include units when given in the problem. Since the sides are measured in centimeters, your perimeter answer should be 22 cm.
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