Question

Two rectangles are similar. If the height of the first rectangle is 3 inches, and the height of the second rectangle is 9 inches, how much longer is the second rectangle's perimeter?

3 times as long
6 times as long
9 times as long
6 inches longer

Answer 1

6 inches longer

Answer 2

thanks

Answer 3

if you were helped you can click best response to reward your helper ;)

Answer 4

nope...i think @niels5x9 is mistaken

Answer 5

true i was wrong i didn't see that last word "perimeter"

Answer 6

since 2 rectangles are similar... their height to breadth ratio should be equal

if the breadth of the first one is "x" and the second one is "y" then
3/x = 9/ y
which means y = 3x

if the perimeter of the first rectangle is P
P = 3 + 3 + x + x = 6 + 2x

if the perimeter of the second rectangle is P'
P' = 9 + 9 + y + y = 18 + 2y = 18 + 6x = 3 ( 6 + 2x ) = 3 P

which means the 3 times the perimeter of the first one :)

Answer 7

@ltj1234