Question

The ratio of the radii of two circles C1 and C2 is 1.5.
The ratio between the circumferences of circles C1 and C2 is ____
and the ratio between the areas of circles C1 and C2 is ______

Answer 1

Answer:

Below in bold.

Step-by-step explanation:

The circumference is one dimensional so the ratio  is the same as the radii,

1.5.

The areas are 2 dimensional so the ratio is 1.5^2 = 2.25.