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geometry[IsOnLine] - test if a point, a list, or a set of points is on a line
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Calling Sequence
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IsOnLine(f, l, cond)
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Parameters
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f
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point, list or set of points
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l
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line
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cond
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(optional) name
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Description
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The routine returns true if the point f or the list/set of points f is on line l; false if it is not; and FAIL if it is unable to reach a conclusion.
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In case of FAIL, if the third optional argument is given, the condition that makes f on line l is assigned to this argument. It will be either of the form  or of the form  where expr, expr_i are Maple expressions.
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The command with(geometry,IsOnLine) allows the use of the abbreviated form of this command.
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Examples
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![line(l1, y = 0, [x, y]), line(l2, x+y = 1, [x, y]), point(A, 1/2, 1/2)](/support/helpjp/helpview.aspx?si=5868/file04070/math101.png)
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IsOnLine: "hint: the following conditions must be satisfied: {-2/5+b = 0, -1/2+a = 0}"
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make the necessary assumptions
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Download Help Document
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