What number do you multiply the perimeter of EFGH by 

to get the perimeter of ABCD? 

ABCD ~ EFGH

You multiply by 4.

The two shapes are similar:

ABCD ~ EFGH

That means all corresponding linear measurements are in the same portion.

We can see that AB = 12 and the corresponding side EF = 3.

So all lengths in ABCD are 4 times as big as EFGH. So the perimeter (also a length) of ABCD is *4* times as big as EFGH.

Answer:

The perimeter is 4 times as much

The area is a 2D measurement. Since the lengths are 4 times as much, the area will be 16 times as much. That's because 4² = 16.

Answer:

The area is 16 times as much

ratio

ABCD : EFGH = 12:3 = 4:1

--->

4/

multiply by 4

5/

multiply by 4^2