It could be, but not necessarily. If one ray is parallel to the ground, the other ray could be going straight up, or it could be parallel to the ground also, just going in a different direction. Think of an L. The angle in that L is 90 degrees. You could rotate that L in any direction so that it sticks straight up, or you could rotate it so that it is flat to the ground, or so that it is pointing down. It is still 90 degrees.
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There is a right angle (90 degrees) and a straight angle (180 degrees).
No. Complementary angles add up to 90 degrees. Supplementary angles add up to 180 degrees.
There are no degrees in a straight line.The angle between two line segments that looks like a single straight line if you didn't knowwhere the vertex of the angle is, measures 180 degrees, and is called a "straight angle".
Square 90.______90. |. | |. | 90.______ 90.
Complementary angles add up to 90 degrees and so 4 times 22.5 degrees = 90 degrees or if you mean 4 times 90 degrees then it is a full turn of 360 degrees