The dimensions of rectangle B are twice the dimensions of rectangle A. The area of rectangle B is 72 cm2. What is the area of rectangle A?
Let the dimensions of rectangle A be x cm by y cm.
Therefore, the dimensions of rectangle B are 2x cm by 2y cm.
The area of rectangle A is given by the formula A = x * y
The area of rectangle B is given by the formula A = 2x * 2y = 4xy
Given that the area of rectangle B is 72 cm^2, we have:
4xy = 72 cm^2
Solving for xy, we get:
xy = 18 cm^2
Therefore, the area of rectangle A is 18 cm^2.