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In AABC, AB =BC angle B =80, then angle A is.
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Step-by-step explanation:
in triangle ABC
AB =BC
A = C (equal sides make equal angles)
A + B + C = 180⁰ (angle sum property of triangle)
A + 80⁰ + A = 180⁰
2A + 80⁰ = 180⁰
2A = 180⁰-80⁰
2A = 100⁰
A = 50⁰
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