For the circle with diameter one inch, for example, answers will likely vary between 3 inches and 3$\frac = 3.25$ or $3$ is reasonable using string and a ruler. Because of the several issues with accuracy, it is possible that the first table will not be a ratio table: we can only expect the ratios of circle circumferences to their diameters will be approximately equivalent.Īnswers here will differ. Circumference of the Circle 2 r 2 × 22 7 × 2. Solution: Given: Radius of the circle 21 c m. It is important for students to realize that the formula for the circumference of a circle applies to mathematical objects only, not to the approximate circles we encounter in the world around us. With all the knowledge of definition and formula, its time to practice some solved examples for the same: Solved Example 1: Find the Circumference of a circle whose radius is 21 cm.
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