A) Circumference = 62.8 yd, Area = 314 yd²
B) Circumference = 14.1 cm, Area = 15.8 cm²
Solution:
A) Radius = 10 yd
The value of π = 3.14
Circumference = 2πr
= 2 × 3.14 × 10
Circumference = 62.8 yd
Area of circle = πr²
= 3.14 × 10²
Area of circle = 314 yd²
B) Diameter = 4.5 cm
Radius = 4.5 ÷ 2 = 2.25 cm
Circumference = 2πr
= 2 × 3.14 × 2.25
Circumference = 14.1 cm (nearest tenth)
Area of circle = πr²
= 3.14 × (2.25)²
Area of circle = 15.8 cm²
