Question

What will be the perimeter and the area of the rectangle below if it is enlarged using a scale factor of 4.5?

A rectangle is shown. The length of the rectangle is labeled as 8 cm, and the width is labeled as 6 cm.

Perimeter = 46 cm, area = 131.25 cm2
Perimeter = 126 cm, area = 972 cm2
Perimeter = 46 cm, area = 972 cm2
Perimeter = 126 cm, area = 131.25 cm2

Answer 1

how did you get the answer? @Loser66

Answer 2

P =?
A=?

Answer 3

Did you delete your last comment, I didnt get to see it. @Loser66

Answer 4

Just answer me, Perimeter = ??
Area =??
(formula)

Answer 5

Perimeter = 2(l+w)
Area= l w

is that what you are asking for? @Loser66

Answer 6

Good, now if the new l, namely l', l' = 4.5l
and the new w , namely w' = 4.5w
then the perimeter of the new one is 2(l' + w') , right? , replace the numbers you can get what you want. Same as area

Answer 7

Ok, but how is the l and w the same? (4.5) I'm confused

Answer 8

@Loser66

Answer 9

They are not the same. just the ratio is the same. l = 8--> l' = 4.5 *8
w = 6, w' = 4.5*6