...Also, the interesting proof of the above is found in comparing how the weights work out on intersection point 1, compared to point 4.

My assumption above is that the distance between C->4 is the same as C->1...  so it goes to reason that the weight for C for point 1 would be the same as the weight for C for point 4 (0.75).

At the same time, the weight for B for point 1 can't be 0.25, because we have to give some weight to A for this point.  But notice that the distance from point 1 to the line between C and A, along the line generated by B->1 is much smaller than the distance from 4 to the line between C and A... so this makes WeightB smaller and the rest goes into WeightA for point 1.

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