Question

NEED HELP GEOMETRY!

Two similar rectangles have lengths 18 in and 12 in. What is the ratio of their widths? What is the ratio of their perimeters?

Answer 1

The ratio of their widths will be the same as the ratio of their lengths:

L1/L2 = 18/12 = 3/2

The ratio of their perimeters will also be:

3/2

because (2L1 + 2W1)/(2L2 + 2W2) = (L1 + W1)/(L2 + W2)

Answer 2

would the area be the same ratio?

Answer 3

@tcarroll010

Answer 4

no

Answer 5

@tcarroll010 hi! can you pleasee help me when you are done here?

Answer 6

sure @erin512

Answer 7

how would i find it out?

Answer 8

The ratio of the areas is 9/4 which is (3/2)^2

Answer 9

thanks so much :)

Answer 10

why would you square it?

Answer 11

First area is LW, the second area is [(3/2)L] x [(3/2)W] = (9/4) of the first area.

Yiou square it because both the length and width are 3/2 bigger.

Answer 12

thanks!

Answer 13

You're welcome and thx for the recognition!