Question

In the figure , AB = AC, BD = DC and ∠ABC = 30. Then the ∠ABD + 2∠ACD is ?

(a) 30 (b) 45 (c) 60 (d) NOTA​

Answer 1

Answer:

b) 45

Step-by-step explanation:

हमें ज्ञात है कि-

AB=AC...............................(1)

BD=DC...............................(2)

angle ABC=30°

हमें ज्ञात करना है-

angle ABD+2angle ACD=?

angle ABD=ACD (1 or 2 se)

angle ABD=15°

OR angle ACD=15°

angle ABD+2angle ACD

=15+2×15

=15+30

=45