Question

area & circumference
round your answers to two deci
2)
3)
radius =
diameter = 8.5
area =
circumference =
5)
6)

Explanation:

Step1: Find the radius

The radius $r$ is half of the diameter. Given diameter $d = 8.5$ in, so $r=\frac{d}{2}=\frac{8.5}{2}=4.25$ in.

Step2: Calculate the area

The formula for the area of a circle is $A=\pi r^{2}$. Substitute $r = 4.25$ in, $A=\pi\times(4.25)^{2}\approx3.14\times18.0625 = 56.72$ in² (rounded to two - decimal places).

Step3: Calculate the circumference

The formula for the circumference of a circle is $C = 2\pi r$ or $C=\pi d$. Using $C=\pi d$ with $d = 8.5$ in, $C=\pi\times8.5\approx3.14\times8.5 = 26.69$ in.

Answer:

Radius = 4.25 in
Diameter = 8.5 in
Area = 56.72 in²
Circumference = 26.69 in