'Python Area of triangle - At least one of the sides will be parallel to the x or y axis

Came up with the following but can't seem to figure out why in some cases i'm getting a negative number:

def getTriangleArea(x, y):
    area = ( (x[0]*(y[1]-y[2])) + (x[1]*(y[2]-y[0])) + (x[2]*(y[0]-y[1]))) / 2
return int(area)

Any thoughts?

python python-3.x

Solution 1:^[1]

You just need to return the absolute value of the area.

def getTriangleArea(x, y):
    area = ( (x[0]*(y[1]-y[2])) + (x[1]*(y[2]-y[0])) + (x[2]*(y[0]-y[1]))) / 2
    return abs(int(area))

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Solution	Source
Solution 1	Srivatsava