Answer:
line: a line that is straight, thin, and never ending.
line-segment: a line but instead of being endless it has two dots at the end stopping it.
ray: only has ONE ending instead of two (so one way doesn't end.)
angle: an angle is the figure formed by two rays.
plane: a flat 2d surface that extends infinitely.
straight angle: the angle rays face in the opposite directions.
right angle: 90 degree angle.
acute angle: an angle that's greater than 0 and less than 90.
obtuse angle: bigger than 90 but less than 180.
Two Angles are Complementary: the two angles add up to 90.
Two Angles are supplementary: they are supplementary when adding up to 180.
intersecting lines: lines crossing paths.
parallel lines: lines that never touch .
perpendicular lines: similar to intersecting but they make a right angle.
Vertical Angles: angles that are opposite when two straight lines intersect
Bisector: a straight line that bisects an angle or a line segment.
Perpendicular Bisector: a line, line segment, or ray that is perpendicular to the middle.
Coplanar: set of points, line segments, rays, et cetera that are in the same plane.
Non-Coplanar: not in the same plane
Collinear: If two or more than two points are on a line close or far from each other, then they are considered collinear.
Non-Collinear: Non-collinear means it doesn't lie on a common line.
Skew Lines: (3d geometry) lines that don't intersect but are parallel
Opposite Ray: two rays that have the same end and go in opposite directions.
Vertex: a point where more than one curves, edges, or lines meet.
Parallel Planes: planes that NEVER touch.
Intersecting Planes: planes that meet.
