Question

Find the eircumference of the circle with the following radius:
a) 7cm
b) 10.5cm
c)5.25cm
d)14cm​

Answer 1

Step-by-step explanation:

Circumference of circle = 2πr

1. C = 2×$\frac{22}{7}$×7cm = 44cm

2. C = 2×$\frac{22}{7}$×10.5cm = 66cm

3. C = 2×$\frac{22}{7}$×5.25cm = 33cm

4. C = 2×$\frac{22}{7}$×14cm = 88cm

Answer 2

Answer:

a) circumference of a circle when, r= 7cm

2πr = 2× 22/7× 7cm

= 44cm

b) circumference of a circle when r= 10.5cm

2πr = 2×22/7× 10.5cm

= 66cm

c) circumference of a circle when r= 5.25 CM

2πr = 2×22/7×5.25cm

= 33cm

d) circumference of a circle when r= 14cm

2πr = 2×22/7× 14cm

= 88cm