Question

There is one full problem these two go together for the third problem pleaser answer both thank you.

Answer 1

It is known that the radius is half the diameter of the circle so it follows:

$r=\frac{d}{2}$

1. For d=16 meters it follows:

$r=\frac{16}{2}=8$

The radius is 8 meters.

2. For d=4 centimeters it follows:

$r=\frac{4}{2}=2$

Hence the radius is 2 centimeters.