Question

Can you please help me

Answer 1

The formula for the area of a circle is:

`A=\pi\cdot r^2`

also the diameter can be written in function of the radius

`D=2\cdot r`

from this equation we can find the radius

`r=(D)/(2)`

this transforms the formula for the area into

`\begin{gathered} A=\pi\cdot((D)/(2))^2 \\ A=(\pi)/(4)\cdot D^2 \end{gathered}`

since the diameter is equal to 26cm, then the area will be

`\begin{gathered} A=(\pi)/(4)\cdot676cm^2 \\ A=169\pi(cm^2)\approx530.93cm^2 \end{gathered}`