Question

Rectangle A measures 9 inches by 3 inches. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that could be the dimensions of Rectangle B.

OPTIONS:
A: 13.5 inches by 4.5 inches
B: 90 inches by 30 inches
C: 4.5 inches by 1.5 inches
D: 8 inches by 2 inches
E: 10 inches by 4 inches

Answer 1

A, B and C

Explanation:

A: A is. If you multiply both numbers by 1.5 you get

• 9*1.5 = 13.5
• 3*1.5 = 4.5

B is. If you multiply 9 by 10 and 3 by 10 you

• 9*10 = 90
• 3*10 = 30

C is. If you multiply 9 by 0.5 and 3 by 0.5 you get

• 9*0.5 = 4.5
• 3*0.5 = 1.5

D and E don't work.