A straight line is equal to a 180 degree angle.
A paraline is a way you draw a line in a distance and or angle
implied line
A ninety degree angle looks like the corner of a piece of paper. Straight up on one side and straight across on the bottom. A straight line is 180 degrees, so half of that (where the vertical line goes) is ninety degrees.
An angle has 3 parts.Two intersecting lines/line segments and the pointof intersection (called the vertex of the angle.)The amount of rotation required to bring one of theline segments to coincide with the other is calledthe value the angle. The most common units of measuring angles are degrees and radians.http://www.mathopenref.com/angle.html
skew, parallel, intersecting.
a line
straight angle
It is not a line. X is two lines meeting in a perpendicular angle(right angle)(90 degrees).
an obtuse angle. Do you go to cardinal hickey academy?
It's a flat line. Or a line segment. Or a "half line" with one endpoint (the vertex of the 0 degree angle).
A straight angle
A right/straight angle. An angle of 90 degrees or ½π radians.
A right angle.
An angle bisector is a line. A bisector is something that cuts something into two equal parts. The line passes through the angle dividing it into two equal parts and is called an angle bisector.
A right angle.
a stupid one A straight line segment.
Perpendicular line segments intercept each other at 90 degrees which is a right angle.