geometry
posted by Rick .
I'm having a hard time with this question:
"AB has endpoints A(n,4n) and B(3n,6n).
Which of the following is true?
A. AB=4n
B. The midpoint of AB is (2n,2n).
C. AB=n√8
D. The midpoint of AB is (4n,10n)".
PLEASE HELP!!!!!
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