Question

Find the circumference of a circle whose diameter is
(A) 9.3 cm
(B) 4.5 cm

Answer 1

Answer:

A) 2×9.3÷2×22÷7 = 29.23 cm (approx)

B) 2×4.5÷2×22÷7 = 14.14 cm (approx)

Step-by-step explanation:

the formula for finding the circumference of a circle =

2πr , where r= radius of the circle.

diameter = radius÷2

Answer 2

Answer: A)29.2 B)14.1

Step-by-step explanation:

A) Diameter:9.3 radius: 9.3/2=4.65

circumference (perimeter)=2πr

2×22/7×4.65

44/7×4.65

204.6/7

29.2 this is the answer

B) diameter:4.5 radius:4.5/2=2.25

circumference of circle: 2πr

2×22/7×2.25

44/7×2.25

99/7

14.1 this is the answer