The sum of the angles of a triangle equals 180 degrees
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A straight angles measure is 180 degrees.
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PROOF
ABC, (180 – angle A) + (180 – angle B) + (180 – angle C) = 360. We can use addition and subtraction to get angle A + angle B + angle C = 180
Created with CAST's UDL Book Builder
Created with CAST's UDL Book Builder