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Find the measure of the third angle of a triangle |
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Answer» We know that the sum of the interior ANGLES of a triangle is 180 ∘ . Let third angle in all the GIVEN triangles be x ∘ . Therefore, (i) 38 ∘ +100 ∘ +x ∘ =180 ∘
x ∘ =180 ∘ −138 ∘
x ∘ =42 ∘
(ii) 116 ∘ +30 ∘ +x ∘ =180 ∘
x ∘ =180 ∘ −146 ∘
x ∘ =34 ∘
(iii) 80 ∘ +40 ∘ +x ∘ =180 ∘
x ∘ =180 ∘ −120 ∘
x ∘ =60 ∘ |
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