Question

For a game, Tony has a rectangle drawn on a piece of paper that has an area of 18 in.2. What should he do to the dimensions in order to have a similar rectangle that's area is only 2 in.2?

Divide them by nine.
Divide them by six.
Divide them by three.
Multiply them by three.

Answer 1

unit analysis
area of small rectangle = 1/9 * area of large rectangle (m^2)
length of small rectangle = x * length of large rectangle (m)
length^2 of small rectangle = x^2 * length^2 of large rectangle (m^2)
x^2=1/9
x=?

Answer 2

A

Answer 3

x=1/3; divide by 3