Question 988123
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It is the general (the common) property of a straight line segment connecting midpoints of two sides of a triangle:


<B>The straight line segment connecting midpoints of two sides of a triangle is parallel to the third side and is half of its length</B>.


See the lesson <A HREF=http://www.algebra.com/algebra/homework/Triangles/The-line-segment-joining-the-midpoints-of-two-sides-of-a-triangle.lesson>The line segment joining the midpoints of two sides of a triangle</A> in this site.