SAT Lines

In the diagram above, points AA and BB have coordinates aa and b,b, such that b>a.b>a. If MM is the midpoint of segment AB,\overline{AB}, and MM has the coordinate x,x, all of the following are true EXCEPT:

(A)   AM=12AB\ \ AM = \frac{1}{2}AB
(B)   MB=bx\ \ MB = b-x
(C)   AMMB\ \ \overline{AM} \cong \overline{MB}
(D)   2x=a+b\ \ 2x = a+b
(E)   x=2ba\ \ x = 2b-a


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