Question 1105751
.
<U>Answer</U>. MA = 4.



<U>Solution</U>


<pre>
In any triangle, the medians are concurrent, which means that they have common intersection point, called the <U>centroid</U>. 

The centroid divides each median in the ratio 2:1 counting from the corresponding vertex.
</pre>


For the proof of this geometric fact see the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Triangles/Medians-of-a-triangle-are-concurrent.lesson>Medians of a triangle are concurrent</A>

in this site.


Also, &nbsp;you have this free of charge online textbook on Geometry

&nbsp;&nbsp;&nbsp;&nbsp;<A HREF=https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson>GEOMETRY - YOUR ONLINE TEXTBOOK</A> 

in this site.


The referred lesson is the part of this online textbook under the topic &nbsp;"<U>Properties of triangles</U>".



Save the link to this online textbook together with its description


Free of charge online textbook in GEOMETRY
https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson


to your archive and use it when it is needed.



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By the way, in your plot  XA  does not seem to be a median . . .