## jessiesec Group Title Find the circumference and the area of a circle with a radius of 11.2 cm. Round to the nearest tenth. one year ago one year ago

1. Mimi_x3 Group Title

well do you know the formula for the circumference of a circle

2. jessiesec Group Title

not really. I've never really been good at this.

3. Mimi_x3 Group Title

okay so a circum of a circle is $$C = 2\pi r$$

4. jessiesec Group Title

ok

5. Mimi_x3 Group Title

$$r$$ is given so you sub it into the formula; and calculate

6. jessiesec Group Title

OK.

7. Mimi_x3 Group Title

nb: area of a cirlce is $$A = \pi r^2$$

8. jessiesec Group Title

Ok. I think I got it now. Thank you!