Question

If
AB=AC and ACD = 120• findLA (b) 60° (a) 50• (c) 70•
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Answer 1

Answer:

Given: AB=AC, ∠ACD=130

∠ACD+∠ACB=180 (Linear pair)

130+∠ACB=180

∠ACB=50

∘

Now, In △ABC,

∠ABC=∠ACB=50 (Isosceles triangle property)

Sum of angles = 180

∠ABC+∠ACB+∠BAC=180

50+50+∠BAC=180

∠BAC=80

∘

Step-by-step explanation:

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Answer 2

some linear angles is 180

then

ACD+angleA=180

angleA=180-120 =60

angle A = 60