11. The perimeter of A is 16 because 2(5 + 3) = 16.
The perimeter of B is 44 because 2(11+11) = 44.
The perimeter of C is 16 because 2(4 + 4) = 16.
The perimeter of D is 14 because 2(3 + 4) = 14.
That means that the perimeter of B is the most since 44 is more than 16 & 14.
12. Figure C has an area of 108 cm² because 9 x 12 = 108.
13. Figure A has an area of 40 square ft. The main mass is 8 x 4, which is 32.
There are 2 smaller squares on the sides, each 2 x 2, which is 8 for both.
32 + 8 = 40 total square feet.
Hope this helps!
