In any circle of radius R, how many arcs with lengths R fit into the circumference?
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If we take the radius of a circle be R. Then, we can define that,
$ R = x $
Hence,
Arcs will be as $ 4x $. As,
A circle can be divided into four parts according to the radius.
Hence, we know that,
[tex]x \times 4[/tex]
[tex] \mapsto \: 4x[/tex]