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18 questions
What is the formula for finding the circumference of a circle?
C = r2
C = rd
A = π·r2
C = π·d
Find the circumference of the circle.
31.4 cm
78.5 cm
314 cm
15.7 cm
Find the circumference of the circle.
78.5 cm
15.7 cm
7.85 cm
19.6 cm
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