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Question

ABCD is a quadrilateral. Then which of the following is true?
  1. AC+BC<(AB+BC+CD+DA)
  2. AC+BD<12(AB+BC+CD+DA)
  3. AC+BD>14(AB+BC+CD+DA)
  4. AC+BD<14(AB+BC+CD+DA)

A
AC+BD<14(AB+BC+CD+DA)
B
AC+BC<(AB+BC+CD+DA)
C
AC+BD>14(AB+BC+CD+DA)
D
AC+BD<12(AB+BC+CD+DA)
Solution
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