Question 257796
If you graph these out, you may notice that there are no right angles. This means we can use one of three formulas:
(1) Hero's formula - approximate
To use this we need the 3 distances. They are: sqrt(255), sqrt(61), sqrt(261)
The semi perimeter, s, is about 12.79
A = sqrt(s*(s-a)(s-b)(s-c))
A = 50.5
(2) matrices
Lets use matricies. If we apply matrices, we get 50.5
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(3) 1/2absinC
This requires trig calculations, which I don't know you have seen.
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So the area is 50.5.