Question

Which expression correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide?

A. (12 cm + 7 cm)
B. 2(12 cm) + 7 cm
C. 12 cm + 2(7 cm)
D. 2(12 cm) + 2(7 cm)

Answer 1

D.
That is what i do 12 x 2 will equal 24 since the are 2 parallel sides like in a rectangle. and it will be the same concept on the other side 7 x 2 = 14 and 24 + 14 will equal 38
hope this helped and is how you are supposed to work it

Answer 2

Answer:
`2(12\ cm)+2(7\ cm)`

Explanation:

We know that the formula to find the perimeter of a rectangle is given b y:-

`P=2(l+w)` , where l is length and w is width.

Then, the expression that correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide will be :-

`P=2(12\ cm+7\ cm)\\\\=2(12\ cm)+2(7\ cm)`

Hence, D is the correct option.