Answer:
4 units.
Explanation:
0 , 6 is 1st quadrant
4, 6 is same y line 4 above
4, 2 is same x line -4 at 2
0, 2 is same y line and has made a 4 x 4 square.
CDCDC, D line meaning CD line is 4
as 0 + 4 = 4 units
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