Question

find (a) the diameter (b) the radius of each circle , given the circumference as{take 22/7} i)22cm ii)8.8m iii)61.6m

Answer 1

Circumference of the circle=2×piexr/pie×d

i)22cm

Diameter=Circumference of the circle/pie

=22÷22/7

=7cm

Radius=d/2=7/2=3.5cm

ii)8.8m

Diameter=Circumference of the circle/pie

8.8÷22/7

=2.8m

Radius=d/2=2.8/2=1.4m

iii)61.6m

Diameter=Circumference of the circle/pie

=61.6÷22/7

=19.6m

Radius=d/2=19.6/2

=9.8m

Hope it helps you

Answer 2

Answer:

1. πd=22

22/7d=22

d=7 cm

r= 2πr

d/2=7/2

r= 3.5