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23-07-2019
Mathematics

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Radius of a circular ground is 21m. Find.
Ti) its circumference.
ii) length of the wire required to fence the ground.

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Аноним Аноним

23-07-2019

The circumference of a circle of radius [tex]r[/tex] is

[tex]C=2\pi r[/tex]

So, in your case, the circumference is

[tex]C=2\cdot \pi \cdot 21 = 42\pi[/tex]

The circumference is actually the length of the "perimeter", so the answer to questions 1 and 2 looks the same actually

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