Any two angles who's measures add up to 180 degrees form a straight angle.
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No. 360 degrees is a full circle. These two angles, when added together would form a straight line, or 180 degrees.
Those angles are called complimentary angles. They add up to 90 degrees. Two angles that add up to 180 degrees are called supplementary angles.
Complimentary angles
The sum of two complementary angles is 90 degrees. The three angles of a triangle add up to 180 degrees. Hence, if you subtract the complementary angles from 180, you have the measure of the third angle: 180 - 90 = 90 (this is the third angle) As a rule, if two angles of a triangle are complementary, the third angle is a right angle (90 deg). The three angles together form a right triangle.
The complementary angles form a right angle with the shared ray.