Question

nick claus plans to have a model train running in a circle around his holiday tree.how many feet of track will he need if the diameter of the circle is 9.5ft? round to the nearest whole number.

Answer 1

We need to find ut the perimeter of a circle. The formula is:

`P = 2*r* \pi`
Where:
r = radius = diameter / 2

We can insert numbers into formula to calculate:

`P = 2* (d)/(2) * \pi \\ P=d* \pi \\ P=9.5* \pi \\ P=29.85`

Nick will need 30 feet of track.