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I need help with this question pls help me

 Dec 12, 2019
 #1
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There is something missing from the question.

As it stands it doesn't have an answer.

Look for the moment at AC, (with C fixed in some way).

Suppose that instead of being told that it's length is 4.1, we are told that it's length is 10 say.

That merely pushes A further from E while having no effect whatever on the length of BC.

It looks like there has to be a relationship between BE and EA.

 Dec 13, 2019
 #2
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It say that BA is a perpendicular BISECTOR of DC !


Doesn't that mean that BA "bisects" DC, or cuts it in half? In other words, DE = EC. Triangle DBE is congruent to triangle EBC since they share the perpendicular height of EB, in addition to having DE=EC. 
Therefore, BD = BC = 3.7 units.[Diagram is not drawn to scale]. That is my take on it. One of the "Mods" should check this.

 Dec 13, 2019

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