Question

I need help finding the circumference of a circle with a diameter of 8m (again)

Answer 1

To find the circumference of a circle with a diameter of 8m is easy. We need to take into account the formula for it:

`C=2\pi r`

Where

• pi is, approximately, equal to 3.1415926535...

,

• r is the radius of the circle. In this case, we have the diameter of the circle. To find the radius, we need to find half of this diameter to get the radius. Then:

`r=(Diameter)/(2)=(8m)/(2)=4m\Rightarrow r=4m`

Therefore, the circumference of a circle with a diameter of 8m (and radius of 4m) is (for pi = 3.14159265359)

`C=2\cdot\pi\cdot4m=2\cdot3.14159265359\cdot4m=25.1327412287m`

If we round the answer to two decimal (or the nearest hundredth) the value for the circumference is equal to 25.13 meters (C = 25.13 m).