5th Grade Geometry Terms

Geometry Terms for 5th Grade - Set 1

35 cards   |   Total Attempts: 184
  

Cards In This Set

Front Back
Point
An exact location in space.
Line
An endless straight path with no endpoints. It is named by two points placed on it.
Ray
A part of a line that has one endpoint and continues without end in one direction. It is named by placing two points on it.
Line segment
A part of a line that includes two endpoints and all of the points between them. It is named by its two endpoints.
Plane
An endless flat surface. It is named by using three points that are not on a line.
Angle
This is formed by two rays that share the same endpoint. It is named by using a point on each side and its vertex as the middle letter. It can also be named by using only its vertex.
Degree
The unit of measure for an angle.
Parallel lines
Lines in a plane that never intersect and are the same distance apart at every point.
Intersecting lines
Lines that cross at one point.
Right angle
An angle that measures 90 degrees.
Perpendicular lines
Lines that intersect to form four right angles.
Acute angle
An angle that measures greater than 0 degrees and less than 90 degrees.
Obtuse angle
An angle that measures greater than 90 degrees and is less than 180 degrees.
Straight angle
An angle that measures 180 degrees.
Protractor
An instrument used for measuring or drawing angles.