Area of triangle from 3 coords

Programming
, ,
1

I am trying to find the area of a triangle given 3 sets of coordinates. How can I convert the coordinates from an array to pairs (a1, b1), (a2, b2), (a3, b3) and calculate the area of the triangle?

def getTriangleArea(x, y):

///What will be the code 

if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    x_count = int(input().strip())

    x = []

    for _ in range(x_count):
        x_item = int(input().strip())
        x.append(x_item)

    y_count = int(input().strip())

    y = []

    for _ in range(y_count):
        y_item = int(input().strip())
        y.append(y_item)

    result = getTriangleArea(x, y)

    fptr.write(str(result) + '\n')

    fptr.close()
2

Here’s the code to convert the coordinates from an array to pairs and calculate the area of the triangle:

def getTriangleArea(x, y):
    a1, b1 = x[0], y[0]
    a2, b2 = x[1], y[1]
    a3, b3 = x[2], y[2]
    area = abs((a1*(b2-b3) + a2*(b3-b1) + a3*(b1-b2))/2)
    return area

This code first extracts the x and y coordinates from the input arrays and assigns them to variables a1, b1, a2, b2, a3, and b3. Then it uses the formula for calculating the area of a triangle given the coordinates of its vertices to calculate the area and returns it.