Area of Triangle with 3 vertices (coordinates) [Leaving Cert]

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@mathstulla. This tutorial video explains how to find the area of the triangle whose 3 vertices are given. Finding the area of the triangle when given the 3 coordinates/points (corners) of the triangle. Coordinate Geometry Leaving Cert Maths
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You are a life saver man. You are a true hero

amaniamzand
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Thanks very much, doing my junior cert in a few weeks and didn't understand that a bit until this video. Keep it up, thanks.👍

CianPrior
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why do you map (2, 5) 0, 0 and would the answer be different if you mapped a different cordinate?

chingumball
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What is the proof or explanation that the area is |x1y2-x2y1|/2 ?

filipsichrovsky