Figure 3 : Sketch ellipse using string
Output of MD2002 05 07
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Keywords : Sketch ellipse
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  • PF + PG = 2*a and a is major semi-axis.
  • F and G are fixed points which are called foci.
  • Locus of P is an ellipse.
  • Equation of locus is x^2/a^2 + y^2/b^2 = 1.
  • If light source is at F, the light will reflect from P to G.
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