a pizza has a diameter of 18. what is the best estimate of the area of the pizza?
A = pi * r^2
A = 3.14 * 9^2
exact answer is 81*pi
expand to as many decimal places as you want.
To find the best estimate of the area of a pizza with a diameter of 18, we can use the formula for the area of a circle, which is A = πr^2, where A is the area and r is the radius.
First, we need to find the radius of the pizza. The radius is half the diameter, so in this case, the radius would be 18/2 = 9.
Now, we can substitute the radius into the formula:
A = π(9)^2
A = π(81)
To get a numerical estimate, we can approximate the value of π to 3.14:
A ≈ 3.14(81)
A ≈ 254.34
Therefore, the best estimate of the area of the pizza is approximately 254.34 square units.