Question

What is Radius ?
Find the circumference of a circle whose diameter is 4.2 cm​

Answer 1

Radius is the length , which starts from the centre of the circle and ends at the boundary of the circle. It is equal at all angles in the circle.

Diameter of circle =2*radius

so,radius =4.2/2

radius =2.1CM.

Circumference of circle=2πr

=)2*22/7*2.1

=)22*0.3×2

=)13.2CM

Answer 2

HEY.......

HERE'S YOUR.......

HIGH RATED GABRU---HARSH

RADIUS ----it is the half of diameter .,.

r=2.1

d Diameter =4.2

THANKS FOR SHARING YOUR QUESTION DUDE