Answer:
1 : 9
Explanation:
The ratio of a rectangle that has an area of 20 square feet and a similar rectangle that has an area of 180 square feet, is 1 : 9.
20 square feet
180 square feet
The larger number would go first, making the answer, 180 : 20.
However, it can still be simplified.
180 : 20 simplified is 1 : 9.
Therefore, the ratio of the areas of these similar rectangles is 1 : 9.