Question

In a triangle ABC side BC is produced to D, if ABC= 40 and ACD=120, <A will be
(a) 110 (b) 90" (c) 80"
(d) 70
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Answer 1

Answer:

c

Step-by-step explanation:

C option is the correct answer of this question

Answer 2

Answer:

<A = 80 °

refer the pic for figure

<ACD + < ACB = 180 °

< ACB = 60°

<A + < B + < ACB = 180

40° + 60° + < ACB = 180 °

<A = 80 °

hope it hepls...