if one angle of a triangle is 80 degree and the other two angle are in the ratio3:7
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80⁰ + 3x⁰ + 7x⁰ = 180⁰ [Sum of all angle of ∆ is 180⁰]
80⁰ + 10x = 180⁰
10x = 100⁰
x = 10⁰
Other two angles are 30⁰ & 70⁰.
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Answer:
the sum of all angle of triangle is 108°
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