Question

Find diameter and circumference if radius is 10.5cm

Answer 1

Hello

Diameter = 2r

=2(10.5)

=21

So, the diameter is 21

Circumference=2πr

=2×22/7×10.5

=66

Circumference is 66

Answer 2

Answer:

Step-by-step explanation:

r (radius) = 10.5cm

d ( diameter) = 2r

d = 2×10.5

=21cm

C (circumference) = 2πr

= 2×πx10.5

= 66cm