no.19 please solve it. DA > 2AC
DA > 2BD
ABC is an equilateral
int in AC; prove that :
p
c
he triangle ABC. Prove
t line joining the vertex
de to any point in the
'ither of the equal sides
•am; AD = AB and AE
(ii) LABD > LC
awcndlng
order of their values.
17. In quadrilateral ABCD. side AB is the longest
and side DC is the shortest. Prove that :
18. In triangle ABC. side AC is greater than
side AB. If the internal bisector of angle
A meets the opm»site side at 'Xiint D. prove
that : ZADC is greater than ZADB.
19. In isosceles triangle ABC. sides AB and AC
20.
are equal. If point D lies in base BC and
point E lies on BC produced (BC being
produced through vertex C), "Ove that :
(i) AC AD
(iii) AE > AD
Given : ED = EC
Prove : AB + AD > BC.
c
D
21. In triangle ABC, AB > AC and D is a
in side BC. Show that : AB > AD.