Let the vertex coordinates of ladder ABCD be a (- 1,2), B (3,4), D (2,1), and ab is parallel to DC, ab = 2 DC, then the coordinates of point C are obtained AB = 2 DC with arrow (plane vector)
The vector AB is (4,2)
Because vector AB = 2, vector DC
So the vector DC is (2,1)
Because D (2,1), so C (4,2)
RELATED INFORMATIONS
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