Question

9. In Fig. 10.28, ZB of AABC is an acute angle and
AD IBC. Prove that
AC = AB + BC-2BC. BD.
(Refer to solved Ex. 5)
A
B
С
Fig. 10.28​

Answer 1

Answer:

Can you post the figure for more clearance ?

Answer 2

..................

Hope this helps you : )