Question

If the diameter of a circle is 9whats the circunfrince

Answer 1

Answer:

Given :

Diameter of circle ( d ) = 9 units

Therefore ,, Radius ( r ) = 9 / 2 units

Circumference of circle = 2 π r

$= 2 \times \frac{22}{7} \times \frac{9}{2} \\ \\ = \frac{22}{7} \times 9 \\ \\ = \frac{198}{7} \\ \\ = 28.28 \: \: units$