a line which is drawn parallel to either of axis makes 90 degree with other axis
A line with equal angles from a surface is referred to as being normal
A straight angle also known as a line
It is called a straight angle.
An obtuse angle is any angle which measures between 90 degrees (that is, a right angle), and 180 degrees (that is, a straight line).
A straight angle is a line which has an angle of 180 degrees therefore two right angles (90 degrees) make a line.
It is called a right angle.
A straight angle (180 degrees) makes a perfectly straight line. Any degree below 180 degrees (0-179 degrees) is NOT a straight angle NOR a straight line. straight angle = 180 degrees straight angle = straight line 180 degrees
90 degrees
180 degrees -- a straight angle
0 degrees
A straight line has an angle of 180 degrees.
A line with equal angles from a surface is referred to as being normal
The angle of incidence is the angle between the incident ray and the normal (perpendicular line) to the surface. In normal incidence, the incident ray is perpendicular to the surface, so the angle of incidence is 0 degrees.
When the original line makes a complete revolution, the formed angle is called a perigon, or round angle.
An angle of 180 degrees is a straight angle, a straight line.
zero degrees is not an angle because there is degrees
Line perpendicular to the surface.