Question

Hi there, Can you help me with number 2 please? I have no idea what I am doing wrong.

Answer 1

The circumference C of a circle with diameter d is given by:

`C=\pi d`

Substitute d = 80 and π ≈ 3.14 into the equation:

`\begin{gathered} C=3.14*80 \\ C=251.2\text{ cm} \end{gathered}`

The area A of a circle with diameter d is given by:

`A=(\pi d^2)/(4)`

Substitute d = 80 and π ≈ 3.14 into the equation:

`A=(3.14*80^2)/(4)=5024`

Therefore, the required circumference is 251.2 cm

Therefore, the required area is 5024 cm²