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Find two circular objects. Measure the diameter and then make a prediction about the circumference of each circle. How could you check your predictions?

1 Answer

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Let's say that the two objects have 5 centimeters and 7 centimeters of diameter.

The circumference of a circle is defined as


C=\pi d

Where d is the diameter. Using the measures above, we have


C_1=\pi(5cm)\approx5\cdot3.14\operatorname{cm}\approx15.7\operatorname{cm}
C_2=\pi(7\operatorname{cm})=7\cdot3.14\operatorname{cm}=21.98\operatorname{cm}

Therefore, the circumferences of the measures obtained are 15.7 and 21.98 centimeters.

User Mitaksh Gupta
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