SOLUTION: Two angles of a triangle have the measure of 55 and 65. Which of the following could not be a measure of an exterior angle of the triangle?

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Question 552346: Two angles of a triangle have the measure of 55 and 65. Which of the following could not be a measure of an exterior angle of the triangle?
Answer by Alan3354(31518) About Me  (Show Source):
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Two angles of a triangle have the measure of 55 and 65. Which of the following could not be a measure of an exterior angle of the triangle?
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The 3 exterior angles are
180-55 = 125,
180-60 = 120 &
180-65 = 115