The diameter of the circle is 6 cm. Find a) the circumference; b) the area of the circle.
| December 30, 2020 | education
C – circumference,
S – area of a circle,
r is the radius.
r = 1/2 × D = 1/2 × 6 = 3
C = 2 × pi × r = 2 × pi × 3 = 6pi or 18.84
S = pi × r ^ 2 = pi × 3 ^ 2 = 9pi or 27.9
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