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Posted by Denis Borris on 21/6/2009, 4:14 pm, in reply to "Comment"
Well, awaiting the hopeful US Open noon tee-off,
keepin' fingers crossed for Mike Weir (better
still, for Nick Taylor!), I said to myself
"hell with brevity, let's hit him with":
Area = cd / 2 ; WHERE:
c = SQRT[(x1 - x2)^2 + (y1 - y2)^2]
d = SQRT[(x3 - x4)^2 + (y3 - y4)^2]
x1 = (c1 - c3) / (m3 - m1) , y1 = (m3c1 - m1c3) / (m3 - m1)
x2 = (c2 - c3) / (m3 - m2) , y2 = (m3c2 - m2c3) / (m3 - m2)
x3 = (c1 - c2) / (m2 - m1) , y3 = (m2c1 - m1c2) / (m2 - m1)
c4 = (m3y3 + x3) / m3
x4 = m3(c4 - c3) / (m3^2 + 1) , y4 = (c4m3^2 + c3) / (m3^2 + 1)
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