1. a) Area: 28.27 cm², Circumference: 18.85 cm
b) Area: 153.94 cm², Circumference: 21.99 cm
c) Area: 12.57 cm², Circumference: 12.57 cm
d) Area: 78.54 cm², Circumference: 15.71 cm
e) Area: 7.07 cm², Circumference: 9.42 cm
f) Area: 3.14 cm², Circumference: 6.28 cm
g) Area: 132.73 cm², Circumference: 40.84 cm
h) Area: 63.62 cm², Circumference: 14.14 cm
2. a) Area: 39.27 cm², Perimeter: 25.71 cm
b) Area: 28.27 cm², Perimeter: 21.42 cm
c) Area: 58.90 cm², Perimeter: 25.71 cm
d) Area: 50.27 cm², Perimeter: 28.56 cm
e) Area: 9.42 cm², Perimeter: 10.28 cm
f) Area: 56.55 cm², Perimeter: 30.85 cm
g) Area: 23.76 cm², Perimeter: 18.85 cm
h) Area: 19.63 cm², Perimeter: 14.28 cm
3. a) Area: 38.57 cm²
b) Area: 28.54 cm²
c) Area: 43.27 cm²
d) Area: 34.28 cm²
4. a) Radius: 5.64 cm
b) Diameter: 100.00 cm
c) Radius: 4.18 cm
d) Diameter: 3.82 cm
Parent Tip: Review the logic above to help your child master the concept of circle area and perimeter worksheet.
