Circles Area, Circumference, Arc Length, and Sector

1. Circles Please complete these problems and include the formulas and all work for full credit

2. Circumference What is the circumference of the circle below? Formula: 2rπ Answer: 43.96 cm2

3. Circumference What is the circumference of the circle below? Formula: dπ Answer: 37.68 in2

4. Arc Length What is the length of arc AB? Formula: m arc/360 x circumference Answer: 3.92

5. Arc Length What is the length of arc XY? Formula: m arc/360 x circumference Answer: 15.63

6. Area What is the area of the circle below? Formula: πr2 Answer: 452.16 cm2

7. Area What is the area of the circle below? Formula:πr2 Answer: 78.5 ft2

8. Area If the area of a circle is 530.66 cm2 what is the length of the diameter? (use 3.14 for pi) πr2= 530.66 Answer: 13

9. Sectors What is the area of the sector below? Formula: m arc/360 x area Answer: 23.31

10. Sectors What is the area of the sector below? Formula: m arc/360 x area Answer: 56.22 cm2

11. Nested Circles Find the area of the grey section: Area= 452.16 - 78.5= Answer- 373.66