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A circle has a radius of 5 units, 3 students tried to calculate the circumference of the circle, put their answers in order from most accurate to least accurate31.4π units 10π units 31.4 units

User Ian Vasco
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1 Answer

4 votes

A circle has a radius of 5 units, 3 students tried to calculate the circumference of the circle, put their answers in order from most accurate to least accurate

31.4π units

10π units

31.4 units ​

we know that

the circumference of a circle is equal to


C=2\pi r

we have

pi=3.14

r=5 units

substitute


\begin{gathered} C=2\pi(5) \\ C=10\pi\text{ units} \end{gathered}

the exact value is 10pi units

the approximate value (assume pi=3.14)

C=31.4 units

so

order from most accurate to least accurate is

10π units

31.4 units

31.4π units

order from least accurate to most accurate is

31.4π units

31.4 units

10π units

User Szbalint
by
6.5k points
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