Question

the figures below are similar. the labeled sides are corresponding. what is the perimeter of the larger rectangle?

Answer 1

For this case we know this_

P1= 18mm

And the perimeter is given by:

18mm = 2*2mm + 2*H

18-4 = 2H

H= 7mm

The scale factor is:

6mm/2mm = 3

Then the height for the second rectangle is:

7*3 = 21mm

Therefore the perimeter is

P2= 2*6mm + 2* 21mm = 12+ 42 mm= 54mm