Math, asked by cloab4078, 1 year ago

If circumference of circle is 12, find the areal?

Answers

Answered by Anonymous
0

Answer:

 \frac{126}{11}  {unit}^{2} or \: 11.454 \:  {unit}^{2}

Step-by-step explanation:

 \bigstar \: circumference \: of \: circle = 12 \: unit \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \therefore 2\pi r = 12 \\  \\  \:  \:  \:  \:  \:  \:  \:  \: \:  \:   \therefore \: 2 \times  \frac{22}{7}  \times r = 12 \\  \\  \:  \:  \:  \:  \:  \: \:  \:  \:    \:  \therefore \: r \:  =  \frac{12 \times 7}{22 \times 2}  \\  \\  \:  \:  \:  \: \:  \:  \:  \:  \:  \:   \therefore \: r =   \frac{84}{44}  =  \frac{21 \times 4}{11 \times 4}  =  \frac{21}{11}  \: unit \\  \\  \bigstar \: we \: will \: find \: to \: area \: of \: circle \: \\  \:  \:  \:  \:  \:  \:  which \: radius \: is \:  \frac{21}{11} unit \\  \\ \:  \:  area \: of \: circle =  > \pi \: {r}^{2}  \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  >  \frac{22}{7}  \times  \frac{21}{11}  \times  \frac{21}{11}  \\  \\ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    =  >  \frac{11 \times 7 \times 3 \times 2 \times 21}{7 \times 11 \times 11}  \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  >  \frac{126}{11}  = 11.454 \:  {unit}^{2}

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