Concurrent
Two or more lines are said to be concurrent if they intersect in a single point. Two lines concur if their trilinear coordinates satisfy
 |
(1) |
Three lines concur if their trilinear coordinates satisfy
in which case the point is
 |
(5) |
Three lines
are concurrent if their coefficients satisfy
 |
(9) |
See also
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Cite this as:
Weisstein, Eric W. "Concurrent." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Concurrent.html