Yes, as for example 78 degrees and 102 degrees would form a supplementary angle of 180 degrees.
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An angle of 72 degrees is acute.
no
Yes.
Right angle, obtuse angle, acute angle, supplementary angle, complementary angle, interior angle, exterior angle, adjacent angle
Obtuse angles are greater than 90 degrees but less than 180 degrees. Straight angles are exactly 180 degrees. Reflex angles are greater that 180 degrees.