SOLUTION: Geometry A triangle Find the measure of angle A when angle B is 129 degrees and angle C is 138 degrees

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Question 994990: Geometry
A triangle
Find the measure of angle A when angle B is 129 degrees and angle C is 138 degrees
Answer by Alan3354(69443) About Me  (Show Source):
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Find the measure of angle A when angle B is 129 degrees and angle C is 138 degrees
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B + C = 267 degrees.
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The sum of the 3 angles of all plane triangles = 180 degs.