Find the circumference and area of each. Round to nearest tenth:

1) A circle has a radius of 8ft

2) A circle has a diameter of 11cm

№1. Given: r=8 ft, π≈3.14

C=2*π*r=2*3.14*8=50.24=50.2 ft

A=π*r²=3.14*64=200.96=201 ft²

Answer: 50.2 ft; 201 ft²

№2. Given: D=11 cm, π≈3.14

d=2r or r=2/d, so if d is 11 cm, then r is 11:2=5.5 cm

C=2*π*r=πD=3.14*11=34.54=34.5 cm

A=π*r²=3.14 * (5.5) ²=94.985=95 cm²

Answer: 34.5 cm; 95 cm²