Answers

2014-07-24T22:29:00+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
ABCD is a parallelogram: AD base.  Now draw bisectors from B meeting CD in F and bisector from D meeting AB in E. 
 We have EAD =EDC = D/2    and  ABF = FBC = B/2
 remember B+C = 180 degress and also  C+D = 180
To prove BF & ED parallel 
           ie.,  EDC = D/2 = BFC  ie., ED & BF make same angle with CD.

angle BFC = 180 - C - B/2  =  B - B / 2 = B/2  or D/2           as angles B = D.
                                   =  angle EDC
So proved.

0