Question: The radius of the circle below is $27$ mm.
Calculate the area of the circle.
Give your answer to $1$ d.p.
1. **State the problem:** We need to find the area of a circle with radius $27$ mm.
2. **Formula:** The area $A$ of a circle is given by the formula:
$$A = \pi r^2$$
where $r$ is the radius.
3. **Substitute the radius:**
$$A = \pi \times 27^2$$
4. **Calculate the square of the radius:**
$$27^2 = 729$$
So,
$$A = \pi \times 729$$
5. **Calculate the area using $\pi \approx 3.1416$:**
$$A \approx 3.1416 \times 729 = 2289.0264$$
6. **Round to 1 decimal place:**
$$A \approx 2289.0 \text{ mm}^2$$
**Final answer:** The area of the circle is approximately $2289.0$ mm$^2$.