Describe the method for drawing an ellipse and explain fociofellipse, midpoint, semi major axis.
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`implies` Select two points `F_(1) and F_2` `implies` A string has its ends fixed at `F_1 and F_2` . `implies` With the tip of a pencil stretch the string taut and then draw a curve by moving the pencil keeping the string taut throughout . `implies` The closed curve you get is called an ellipse. `implies` For any point T on the ellipse, the sum of distances from `F_1 and F_2` is a constant. `F_1 and F_2` are called the foci. `implies` Join the points `F_1 and F_2` and extend the line to intersect the ellipse at points P and A as shown in figure. The midpoint of the line PA is the centre of the ellipse ..O... `implies` The length PO = AO is called the semi major axis of the ellipse.
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