Each problem I solved became a rule which served afterwards to solve other problems.
—
Rene
Descartes (1596–1650)4.7 Tangent Lines to Point Conics
Each problem I solved became a rule which
served afterwards to solve other problems.
—Rene
Descartes (1596–1650)
Points P and P' are two points of a point conic which may be taken as the centers of the pencils of lines for the projectivities defining the point conic. Note that the two lines that are projectively related to the line PP' both appear to be tangent to the point conic.
Drag P and
P' to new positions.
To reset to the original settings, type the letter "R" on the keyboard.
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© Copyright 2005, 2006 - Timothy Peil |
