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How to find intersection between one line and its perpendicular passing by another point

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Hi,
I cannot find a simple solution to find the coordinates of point d
I know the coordinates of a, b and c .
I need to know where the blue line passing by point c will cross the red line with angle 90 degrees (find d point)
Could someone help me ??

Answers (1)

Joseph Cheng
Joseph Cheng on 12 Dec 2022

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