Question #99abd

1 Answer
Scott F.
Dec 7, 2017

#AB=20#

Explanation:

#bar(DB)# is a median to #bar(AC)#, therefore by definition #B# is the midpoint of #bar(AC)#. Since #B# is the midpoint of #bar(AC)#, #bar(AB)congbar(BC)#, therefore #AB=BC#. Since #BC=20# and #AB=BC#, #AB=20#.

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