Let ABCD be a convex quadrilateral, and let M and N be the midpoints of sides AD and BC, respectively. Prove that MN<=(AB+CD)/2.
I need the proof
+26367 Let ABCD be a convex quadrilateral, and let M and N be the midpoints of sides AD and BC, respectively.
Prove that MN<=(AB+CD)/2.
obversely see: https://web2.0calc.com/questions/help-on-geometric-proof#r1
+26367 Let ABCD be a convex quadrilateral, and let M and N be the midpoints of sides AD and BC, respectively. Prove that MN<=(AB+CD)/2.
see: https://web2.0calc.com/questions/help-pleaseee_4#r3
