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Answer:
80° because sum of angles of triangle is 180°
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Answered by
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Answer:
angle sum property of triangle is 180⁰
in triangle pqr
p + q + R = 180⁰
40⁰ + 60⁰ + R = 180⁰
100⁰ + R = 180⁰
R = 180⁰-100⁰
R = 80⁰
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