a = 56
given 28 = a
multiply both sides by 2 to eliminate the fraction
56 = a
As a check
× 56 = 28 ← True
Find the radius of a circle that has a circumference of 16.
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a = 56
given 28 = a
multiply both sides by 2 to eliminate the fraction
56 = a
As a check
× 56 = 28 ← True