Question

the diameter of a circle is 7cm . find its area .​

Answer 1

Answer:

A≈38.48cm²

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Answer 2

$\huge \underline{ \underline{ \texttt{GIVEN:}}}$

$\sf \circ \: \: \: \: \: Diameter \: of \: circle=7 \: cm$

$\huge \underline{ \underline{ \texttt {TO \: FIND:}}}$

$\sf \circ \: \: \: \: \: Area \: of \: circle$

$\huge \underline{ \underline{ \texttt{SOLUTION:}}}$

$\sf Diameter \: of \: circle=7 \: cm$

$\sf Radius= \large\frac{diameter}{2}$

$\sf Radius= \large \frac{7}{2} cm$

$\underline{ \boxed{ \sf \bigstar \blue{ Area \: of \: circle = \pi \: {r}^{2} }}}$

$\sf \implies \large \frac{ \cancel{22}}{ \cancel7} \times \frac{ \cancel{7}}{ \cancel2} \times \frac{7}{2}$

$\sf \implies \large\frac{11 \times 7}{2}$

$\sf \implies \large \frac{77}{2}$

$\large \underline{ \boxed{ \sf \purple{\implies38.5 cm {}^{2} }}}$

Answer 3

$\huge \underline{ \underline{ \texttt{GIVEN:}}}$

$\sf \circ \: \: \: \: \: Diameter \: of \: circle=7 \: cm$

$\huge \underline{ \underline{ \texttt {TO \: FIND:}}}$

$\sf \circ \: \: \: \: \: Area \: of \: circle$

$\huge \underline{ \underline{ \texttt{SOLUTION:}}}$

$\sf Diameter \: of \: circle=7 \: cm$

$\sf Radius= \large\frac{diameter}{2}$

$\sf Radius= \large \frac{7}{2} cm$

$\underline{ \boxed{ \sf \bigstar \blue{ Area \: of \: circle = \pi \: {r}^{2} }}}$

$\sf \implies \large \frac{ \cancel{22}}{ \cancel7} \times \frac{ \cancel{7}}{ \cancel2} \times \frac{7}{2}$

$\sf \implies \large\frac{11 \times 7}{2}$

$\sf \implies \large \frac{77}{2}$

$\large \underline{ \boxed{ \sf \purple{\implies38.5 cm {}^{2} }}}$