Problem 2861. Is the test point on the line segment?

Given the [x,y,z] coordinates for the three points pa, pb, and pc, return true if the test point pc is on the line segment with endpoints pa and pb.

pc is on the line segment if it lies at one of the end points.

Solve

Last Solution submitted on Jan 22, 2026

Guillaume on 22 Jan 2015

Your recent edit to the test suite broke it. You need a space or a comma between the two -1 in the definition of pa in the first test.

Brian Hannan on 22 Jan 2015

Thanks, Guillaume. I just fixed the error.

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