AreConcurrent Command

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AreConcurrent[ <Line>, <Line>, <Line> ]
Decides if the lines are concurrent. If the lines are parallel, they considered to have a common point in infinity, thus this command returns true in this case.

Normally this command computes the result numerically. This behavior can be changed by using the Prove command.

Example:
AreConcurrent[Line[(1, 2), (3, 4)], Line[(1, 2), (3, 5)], Line[(1, 2), (3, 6)]] yields true since all three lines contain the point (1,2).
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