Question

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Answer 1

Answer:

$as \: we \: now \: the \: triangle \: all \: side \: is \: = 180.\\ now \: let \: the \: third \: side \: be \: x. \\ then \\ 12 + 15 + x = 180 \\ 27 + x = 180 \\ x = 180 \div 27 \\ x = 6.6667.$

so the measure of the third angle is 6.6667.

Step-by-step explanation:

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