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| function getX3(p1, p2, y3) { | |
| let [x1, y1] = p1; | |
| let [x2, y2] = p2; | |
| let slope = (y2 - y1) / (x2 - x1); | |
| let dy = y3 - y1 | |
| return x1 + ((1 / slope) * dy) | |
| } |
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