Question

Find the area, circumference and radius when diameter is 4.2 cm

Answer 1

Step-by-step explanation:

To find,

area=?; circumference=?; radius=?

given:-diameter is 4.2 cm

radius= diameter/2

radius=4.2/2

radius=2.1 cm

circumference =πd

=3.14×4.2

=13.188 cm

area=πr²

= 22/7×(2.1)²

=3.14×2.1×2.1

=13.8474 cm² or sq.cm