A circle is made from 176cm long wire. Find the area of circle.
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we will find area of circle by 2 pie r
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Solution :
Let the radius of the circle made by
the wire = r cm
Circumference ( C ) = length of the wire
2πr = 176 cm
r = ( 176 )/( 2π )
r = 88/π ----( 1 )
Area of the circle ( A ) = πr²
= π ( 88/π )²
= ( π × 88 × 88 )/( π × π )
= ( 88 × 88 × 7 )/22
= 4 × 88 × 7
= 2464 cm²
Therefore ,
area of the circle ( A ) = 2464 cm²
••••
Let the radius of the circle made by
the wire = r cm
Circumference ( C ) = length of the wire
2πr = 176 cm
r = ( 176 )/( 2π )
r = 88/π ----( 1 )
Area of the circle ( A ) = πr²
= π ( 88/π )²
= ( π × 88 × 88 )/( π × π )
= ( 88 × 88 × 7 )/22
= 4 × 88 × 7
= 2464 cm²
Therefore ,
area of the circle ( A ) = 2464 cm²
••••
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