The midsegment of a trapezoid divides into two equal parts the two sides from which it extends and, in addition, is parallel to both bases of the trapezoid and measures half the length of these.** Let's see the properties of the midsegment of a trapezoid in the following illustration:**

If $EF$ Midsegment** then:**

$AE=DE$

$BF=CF$

$AB∥EF∥DC$

$EF=\frac{AB+DC}{2}$