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Conic Section

A conic section is entered as a quadratic equation in x and y. Previously defined variables (numbers, points, vectors) can be used. The conic section's name has to be entered at the beginning of the input followed by a colon.

| equation
ellipse ell | ell : 9x2 +16y2 = 144
hyperbola hyp | hyp : 9x2 -16y2 = 144
parabola par | par : y2 = 4x
circle k1 | k1 : x2 + y2 = 25
circle k2 | k2 : (x - 5)2 + (y + 2)2 = 25

Let be `a=4` and `b=3` for example. Now we can enter an ellipse as ell : b2x2 + a2y2 = a2b2.