Basic Definitions
Congruency
Anglish
Angle Pairs
Lines
100
A straight path that extends in two opposite directions without end and has no thickness.
What is a line?
100
The point that divides a line segment into two congruent segments.
What is a midpoint?
100
An angle that measures less than 90 degrees.
What is an acute angle?
100
Two coplanar angles with a common side, a common vertex, and no common interior points.
What are adjacent angles?
100
Two lines that intersect to form right angles.
What are perpendicular lines?
200
A flat surface that extends without end and has no thickness.
What is a plane?
200
A point, line, ray, or other segment that intersects a segment at its midpoint.
What is a segment bisector?
200
An angle that measures exactly 90 degrees.
What is a right angle?
200
Two angles whose sides are opposite rays.
What are vertical angles?
200
Lines in the same plane that are the same distance apart over their entire length.
What are parallel lines?
300
The part of a line that consists of two endpoints and all points between them.
What is a line segment?
300
Formed by two rays with the same endpoint.
What is an angle?
300
An angle that measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
300
Two angles whose measures have a sum of 90 degrees.
What are complementary angles?
300
A line, segment, or ray that is perpendicular to the segment at its midpoint.
What is a perpendicular bisector?
400
The part of a line that consists of one end point and all the points on the line on one side of the endpoint.
What is a ray?
400
The endpoint of an angle.
What is the vertex?
400
An angle that measures 180 degrees.
What is a straight angle?
400
Two angles whose sum is 180 degrees.
What are supplementary angles?
400
The ratio of the vertical change to the horizontal change between any two points.
What is slope intercept form?
500
Two rays that share the same endpoint and form a line.
What are opposite rays?
500
A ray that divides an angle into two congruent angles.
What is an angle bisector?
500
Angles with the same measure.
What is congruent?
500
A pair of adjacent angles whose non-common sides are opposite rays.
What are a linear pair?
500
y=mx+b.
What is slope intercept form?