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Step-by-step explanation:
angle acb=180-130=50(linear pair)
so, angle A+B+C=180(angle sum properties) angle A+80+50=180
A=130=180
A=180-130
A=50 ans
Answered by
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Answer:
sum of interior angles =exterior angle
80+x=130
x=130-80
x=50
sum of interior angles=180°
80+50+x=180
130+x=180
x=180-130
x=50
and in ∆ABC angleA andangle C are equal
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