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10 cards from this deck
The product of their gradients is −1-1−1.
Use m=(y2−y1)/(x2−x1)m = (y_2 - y_1) / (x_2 - x_1)m=(y2−y1)/(x2−x1).
Parallel lines have the same gradient.
It is −1/m-1/m−1/m.
Multiply their gradients; result should be −1-1−1.
Rearrange the equation to isolate yyy on one side.
The gradient is 333.
The perpendicular gradient is −1/2-1/2−1/2.
Use negative reciprocal of the original line's slope.
Midpoint = ((x1+x2)/2,(y1+y2)/2)((x_1+x_2)/2, (y_1+y_2)/2)((x1+x2)/2,(y1+y2)/2).
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