Question

A circle's area is directly proportional to its radius squared.

What is the constant of proportionality (to 2 decimal places)?
(Area of a circle = rr2)

Answer 1

9514 1404 393

Answer:

3.14

Explanation:

The formula for the area of a circle is ...

A = πr²

The constant of proportionality is the constant in this equation: π. To two decimal places, the value of π is 3.14.

The constant of proportionality is about 3.14.