The Midsegment Theorem

The midsegment hteorem states that:
In a triangle,the segment joining the sides of the 2 midpoints of these sides is parallel to the third side in the triangle(other than the 2 sides which the segment joins their midpts.)and is equal to half of it.
In a trapezoid,the segment joining the midpoints of the legs(the 2 nonparallel sides),is parallel to both the bases(parallel sides)and is equal to half their sum.

The midsegment hteorem states that:
In a triangle,the segment joining the midpoints of 2 sides is parallel to the third side in the triangle(other than the 2 sides which the segment joins their midpts.)and is equal to half of it.
In a trapezoid,the segment joining the midpoints of the legs(the 2 nonparallel sides),is parallel to both the bases(parallel sides)and is equal to half their sum.

what is the midsegment hteorem

didn't you read the passage?Whay are you asking me?