The formula for the circumference of a circle = 2 x radius x pi
The radius is given as 21 cm and pi = 3.142
Circumference = 2 x 21 x 3.142 = 131.964 cm
Answer:
131.964 cm
Step-by-step explanation:
[tex]C = 2 \pi r = 2 * 3.142 * 21 = 3.142 * 42 = 131.964 \ cm[/tex]
