Answer:
1. 4
2. x²+y²=4
3. x²+y²-144=0
4. 12
5. 15
6. x²+y²=225
7. x²+y²-72=0
8. √72 or estimated 8.49
9. √6 or estimated to 2.45
10. x²+y²=6
For graphing the circle, use a compass and ruler or anything that can be use to measure. Use the radius of each equation. Look at the illustration.
