Geometric shape formed by two rays (initial and ending sides of the angle) that share a common endpoint called the vertex. You may name an angle using the vertex, or a point in each ray and the vertex label in the center.
An angle that is between 0 and 90 degrees.
If two angles have a common side, a common vertex and no common interior points then they are adjacent.
In the same line.
Within the same plane.
An infinite set of points that extends forever in two directions. 2 points on the line allows to uniquely define it.
Not in the same line.
An angle whose measure is greater than 90 but less than 180 degrees.
A two-dimensional group of points that goes on infinitely in all directions; made up of infinite lines
Indicates a location in space and has no size. It is represented by a dot and usually labeled with uppercase letters. It is uniquely identified by a set of coordinates (x,y) in the plane, and (x,y,z) in the space.
The section of a line that has one endpoint in one side and it never ends at the other side. (flash light beam pointing to the space)
A section of a line, defined by two end points and all the points between them.
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