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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

 Mar 20, 2019
 #1
avatar+25232 
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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

 

laugh

 Mar 20, 2019
 #2
avatar+25232 
+1

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

 

laugh

 Mar 21, 2019

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