Question

what is radis?

what is dimeater?​

Answer 1

Radius is a line segment from centre of the circle to its boundary which means it is half of diameter

Diameter is a line segment which pases through centre of the circle form one end to the other end of the circle boundary that is it is twice of radius

Hope this helps you

Answer 2

Radius: The radius is nothing but half of the diameter.

Diameter:   The diameter is nothing but twice the radius.

        refer to the attachment: hope it helps you!