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What is the area, in square units, of a triangle whose vertices are at (4,-1), (10,3) and (-4,5)?

 May 11, 2021
 #1
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I don't see a real easy way of doing this....

   you could use the distance formula 3 times to get the 3 side lengths and then use Heron's formula to calculate the area ...

 

 

Or you could calculate the entire rectangle (shown beow) and subtract the  3 right triangles from the area (actually, that would be fairly easy)

 

 May 11, 2021

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