SOLUTION: Points A(1,1), B(6,2), C(8,5) form the vertices of a triangle. find the area

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Question 1017191: Points A(1,1), B(6,2), C(8,5) form the vertices of a triangle. find the area
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
Shoelace theorem

1.....1
6.....2
8.....5
1.....1

left to right: 1*2 + 6*5 + 8*1 = 40
right to left: 1*6 + 2*8 + 5*1 = 27

area = 1/2 * |40 - 27| = 6.5