Proof about mid-segment of a trapezoid

Prove theorem: The mid-segment of a trapezoid is parallel to each base and its measure is 1/2 the sum of the lengths of the bases.

[@chridammarquez4361]

You saved my A on my Geometry class, Sir. Tomorrow I have my final exam, Thanks a LOT!

[@anonymousperson560]

Thank you so much. Just. Thank you.

[@ISHYGDDT2013]

thank you for this video. helped a lot. :D

[@ajchat8701]

AD+BC= 2EF....not .5EF