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  • An ellipse is described by using an endless string which is passed over two pins

An ellipse is described by using an endless string which is passed over two pins .If the Axes are 6 cm and 4 cm a necessary length of the string in centimetres is 6+2 5^1/2

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@shekhar suman 

lenght of string is 6

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Safeer PP

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@shekhar suman

a=3cm,\ b=2cm,\ e=\sqrt{1-\frac{b^2}{a^2}}=\sqrt{1-\frac{2^2}{3^2}}=\frac{\sqrt{5}}{3}\\focii are(\pm ae, 0)=(\pm \sqrt{5},0)\\string length =6cm

 

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Safeer PP

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