Question

Find circumference and area of : a) radius = 10 cm
And
b) Diameter = 12 cm

Answer 1

r=10cm

circumference =2pieR
=2*22/7*10
slove it

area =pieR^2
=22/7*100

Answer 2

Step-by-step explanation:

(a) radius = 10 cm

Circumference = 2*pi*r = 2*22/7 * 10 = 62.85 cm [or 20*pi]

Area = pi*r^2 = 22/7 * 10 * 10 = 314.28 cm^2  [or 100*pi]

(b) diameter = 12 cm

     radius = 6 cm

Circumference = 2*pi*r = 2 * 22/7 * 6 = 37.71 cm  [or 12*pi]

Area = pi*r^2 = 22/7 * 6 * 6 = 113.14 cm^2  [or 36*pi]