Question

Solve the missing elements for each problem. Use 3.14 for π. Area = πr^2; C=π D

Answer 1

Given,

Diameter = 32 cm

Radius

We know the radius is half of the diameter. Thus,

`\begin{gathered} r=(32)/(2) \\ r=16 \end{gathered}`

Radius 16 cm

Circumference

The formula is:

`C=\pi D`

Where

D is the diameter

So,

`\begin{gathered} C=\pi D \\ C=(3.14)(32) \\ C=100.48 \end{gathered}`

Circumference = 100.48 cm

Area

The formula is:

`A=\pi r^2`

Where

r is the radius

So,

`\begin{gathered} A=\pi r^2 \\ A=(3.14)(16)^2 \\ A=(3.14)(256) \\ A=803.84 \end{gathered}`

Area = 803.84 sq. cm.