Given 3 points of the triangle:(adsbygoogle = window.adsbygoogle || []).push({});

(1,2)

(4,6)

(9,10)

Determine if point (5,4) belongs to triangle (is located inside the triangle).

the only way i can think of doing this is as follows but there must be a more sound way.

so you have lines:

(1,2)->(4,6)

(4,6)->(9,10)

(1,2)->(9,10)

you need all 3 of the following to hold true for point (5,4)

y <= 4/3x + 2/3 (true)

y >= x + 1 (false)

y <= 4/5x + 14/5 (false)

any help greatly appreciated.

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# Homework Help: Simple Geometry Proof

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