Basic Definitions
A line that extends indefinitely in one direction
Ray
Used to find the distance between two points on a coordinate plane
Distance formula
Two angles that sum to 90 degrees
Complementary angles
An angle that measures 90 degrees
Right angle
Ms. Hahn's favorite color
Purple
A location with no size or shape
Point
Two lines that intersect at a 90 degree angle
Perpendicular lines
Two angles that sum to 180 degrees
Supplementary angles
An angle measuring less than 90 degrees
Acute angle
How many dogs does Ms. Hahn have?
2
Flat surface made up of points and extends indefinitely in all directions
Plane
Used to find the midpoint between two endpoints on a coordinate plane
Midpoint formula
Two angles that share a common side and vertex; next to each other
Adjacent angles
An angle measuring more than 90 degrees
Obtuse angle
Ms. Hahn's favorite number
7
Made up of points with no thickness or width
Line
Two lines that never intersect
Parallel lines
Two angles directly across from each other on intersecting lines
Vertical angles
An angle measuring exactly 180 degrees
Straight angle
Where did Ms. Hahn travel to over the summer?
New York
Points that lie on the same line
Collinear
Measurable part of a line; consists of two endpoints
Line segment
A line or ray that divides an angle into two equal parts
Angle bisector
Two angles with the same measure
Congruent angles
Ms. Hahn's favorite Disney movie
Tangled