Question

11. If you want to enlarge a square with area 36 square inches

by a factor of 3, what would be its new perimeter?

a. 18 inches
b. 24 inches
c. 324 inches
d. 8 inches
e. 72 inches

Answer 1

e. 72 inches

Explanation:

Well, firstly to find the lengths of the sides, we would have to find the square root of 36 (which is 6, as 6x6=36).

Now, if we enlarge the square by SF 3, the new side lengths would be 6x3=18 inches. That is only one side.

Now we know the length of one side, we can do 18x4 (because as we all know, squares have 4 sides) to find the perimeter.

18x4=72 inches. This means the answer is option e.