Question

How do you do this question? I don’t understand it very well.

Answer 1

$radius = \frac{d}{2} \\ \\ r = 4.5 \: cm \\ area \: of \: circle \: = 2\pi \: r \\ \\ = 2 \times 3.142 \times 4.5 \\ = 28.27 {cm}^{2}$

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Answer 2

Answer:

Step-by-step explanation:

area of circle = pi r^2

= 3.142 * 9/2 * 9/2

= 3.142 * 81/4

=63.6255 cm^2