Question

if the radius of a circle is 21 cm what is the measure of its circuference?​

Answer 1

Answer:

given:

radius = 21 cm

to find :

circumference

circumference = 2πr

= 2×22/7 × 21

= 2×22×3

= 44×3

= 132

Answer 2

Answer:

132 cm

Step-by-step explanation:

Circumference = 2πr

r = 21 cm

$So, Circumference = 2\pi \times r \\ = 2 \times \frac{22}{7} \times 21 \\ = 132cm$

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