Question

If the circumfernece of a circle is 4pie cm, what
will be its area?


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Answer 1

Question :

If the circumfernece of a circle is 4pie cm, what

will be its area?

Answer :

• circumference is $\sf {4\pi }$

• what will be area ?

Circumference of circle = $\sf {2\pi r}$

$\\ \longrightarrow\sf { 4\pi = 2\pi r }$

$\\ \longrightarrow\sf { 4 = 2r }$

$\\ \longrightarrow\sf { r = \dfrac {4}{2} }$

$\\ \longrightarrow\sf { r = 2 }$

Area of circle = $\sf {\pi {r}^{2}}$

$\\ \longrightarrow\sf { \pi {2}^{2} }$

$\\ \longrightarrow\sf { 4\pi}$