Question

In δabc, the sum of the measures of ∠a and ∠b is 47º. what is the measure of ∠c?

Answer 1

The answer is: 133° .
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Let us assume you mean to write: "Δ abc" .
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All angles in a triangle add up to 180 degrees;
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so, if: m∡a + m∡b = 47 ;
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then m∡c = 180 − 47 = 133° .
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