Lesson 15 Circle functions
Worksheet 2 Area and circumference
1.Fill in the table, taking the value of Pi as 3. (Or use its value in the calculator and then round to nearest whole number.)
| Radius | Circumference | Area |
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 |
2. Draw the graphs for the circumference and the area on the grid on Worksheet
3. Use letter A for area points and letter C for circumference points. Join the letters.
3. Describe the differences between the two graphs.
4. A circle has an area of about 100.
(a) How do you find it’s radius?
(b) How do you find its circumference?