Unit 2 Part 1: Basics of Geometry Vocabulary
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/24
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai | Chat |
|---|
No analytics yet
Send a link to your students to track their progress
25 Terms
Acute angle
An angle that measures greater than 0 degrees and less than 90 degrees.
Adjacent angle
Two angles in the same plane with a common vertex and a common side, but no common interior points.
Angle
A figure formed by two rays with a common endpoint. The common endpoint is called the vertex.
Angle bisector
A ray that divides an angle into two congruent angles.
Circle
The set of points in a plane that are a fixed distance from a given point called the center of the circle.
Collinear
Points that lie on the same line.
Complementary angles
Two angles whose measures have a sum of 90 degrees.
Congruent
Having the same size and shape.
Endpoint
A point at an end of a segment or the starting point of a ray.
Line
An undefined term in geometry, a line is a straight path that has no thickness and extends forever.
Midpoint
The point that divides a segment into two congruent segments.
Obtuse angle
An angle that measures greater than 90 degrees and less than 180 degrees.
Parallel lines
Lines in the same plane that do not intersect.
Perpendicular
Intersecting to form a 90 degree angle (right angle).
Plane
An undefined term in geometry, it is a flat surface that has no thickness and extends forever.
Point
An undefined term in geometry, it names a location and has no size.
Postulate
A statement that is accepted as true without proof.
Ray
A part of a line that starts at an endpoint and extends forever in one direction.
Right angle
An angle that measures 90 degrees.
Segment bisector
A line, ray, or segment that divides a segment into two congruent segments.
Segment
A part of a line consisting of two endpoints and all points between them.
Straight angle
A 180 degree angle.
Supplementary angles
Two angles whose measures have a sum of 180 degrees.
Undefined terms
A basic figure that is not defined in terms of other figures. The undefined terms in geometry are point, line, and plane.
Vertex of an angle
The common endpoint of the sides of the angle.