how much fencing is needed to close a circular garden whose radius is 4.5
You need to find the circumference.
C = pi * d
To find out how much fencing is needed to close a circular garden, you need to compute the circumference of the circle. The formula for the circumference of a circle is C = 2πr, where "C" represents the circumference and "r" represents the radius.
In this case, the given radius is 4.5. So, you can substitute this value into the formula:
C = 2π(4.5)
To get the numerical value, you can use the approximation of π as 3.14:
C = 2 * 3.14 * 4.5
By performing the multiplication:
C = 28.26
Hence, the garden would require approximately 28.26 units of fencing to close it.