Question

Find the area and the circumference of a circle with diameter 8cmUse 3.14 for n , and do not round your answer

Answer 1

Circumference of the circle is 25.12 centimeters

Area of the circle is 50.24 square centimeters

Explanation:

We have that the formula for the circumference and the area are the following:

`\begin{gathered} c=2\cdot\pi\cdot r \\ A=\pi\cdot r^2 \end{gathered}`

The radius is equivalent to half the diameter, therefore, we replace:

`\begin{gathered} r=(d)/(2)=(8)/(2)=4 \\ \text{ replacing} \\ c=2\cdot3.14\cdot4=25.12\text{ cm} \\ A=3.14\cdot4^2=50.24cm^2 \end{gathered}`

the circumference of the circle is 25.12 cm and the area is equal to 50.24 square centimeters