Question

how to solve this question?

Answer 1

ABC=ACB
DBC=DCB(base angles of isoceles triangle.)
So ABC+DBC=ACB+DCB
Or, ABD=ACD
Hope this helps.
Best wishes!

Answer 2

hello friends..
Question:-
show that angle ABD = angle ACD
Solution:-
here .
angle ABC = angle ACB (because AB=AC)
and also
angle DBC = angle DCB (because BD= DC)

now
angle ABD = angle ABC + angle DBC
and
angle ACD = angle DCB +angle ACB

=> angle ABD = angle ABC + angle DBC
= angle DCB +angle ACB = angle ACD

( because angle ABC = angle ACB
& angle DBC = angle DCB)

## hope it helps##