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geometry[AreCollinear] - test if three points are collinear
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Calling Sequence
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AreCollinear(P, Q, R, cond)
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Parameters
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P, Q, R
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three points
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cond
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(optional) name
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Description
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Points P, Q, R are said to be collinear if they lie on the same straight line.
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The routine returns true if P, Q, and R are collinear; false if they are not; and FAIL if it is unable to determine if the three points are collinear.
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If FAIL is returned, and the optional argument cond is given, the condition that makes the points collinear is assigned to this argument.
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The command with(geometry,AreCollinear) allows the use of the abbreviated form of this command.
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Examples
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AreCollinear: "hint: could not determine if 2*my-3*mx is zero"
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make necessary assumption so that A, F, M are collinear
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