Which of the pairs is diagonally opposite to each other?
DA
BC
CE
AC
Which of the following pairs are diagonally opposite to each other?
In the adjoining figure, ABCD is a quadrilateral and AC is one of its diagonals. Prove that
(i) AB + BC + CD + DA > 2AC
(ii) AB + BC + CD > DA
(iii) AB + BC + CD + DA > AC + BD.
79. The flats of which of the other pair than DF are diagonally opposite to each other?