It tells you if the angle is acute, right, obtuse or reflex.
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The 3 interior angles are 90 degrees, 45 degrees and 45 degrees
130 degrees is the measure of the base angles of an isosceles triangle whose vertex has a measure of 50 degrees.
degrees
supplementary angles.
The angles are 140 degrees, 20 degrees and 20 degrees that add up to 180 degrees