Question

find the circumference of the circle whose 1)daimeter= 9 cm​

Answer 1

Answer:

circumference=2πr

=2×22/7×9/2

=198/7

Answer 2

Answer:

$circumference \: of \: circle = 2\pi \: r \\ radius(r) = \frac{9}{2} = 4.5 \: cm \\ = 2 \times \frac{22}{7} \times 4.5 \\ = \frac{198}{7} \\ = 28.285$