Building Blocks
This geometric figure represents a location in space and has no length or width.
What is a point?
This figure is formed by two rays that share a common endpoint.
What is an angle?
These two angles share a common vertex and a common side.
What are adjacent angles?
These are two adjacent angles whose noncommon sides form a straight line.
What is a linear pair?
This flat surface extends infinitely in all directions.
What is a plane?
This straight, continuous arrangement of infinitely many points extends forever in both directions
What is a line?
This is the common endpoint of the two rays that form an angle.
What is the vertex?
These two nonadjacent angles are formed by two intersecting lines and are opposite each other.
What are vertical angles?
This ray divides an angle into two angles of equal measure.
What is an angle bisector?
Points that lie on the same line are called these.
What are collinear points?
This part of a line has two endpoints and includes every point between them.
What is a line segment?
An angle measuring greater than 0∘ and less than 90 has this classification.
What is an acute angle?
These two angles have measures that add to 90∘
What are complementary angles?
This point divides a segment into two congruent segments.
What is the midpoint?
Two or more lines located in the same plane are called these.
What are coplanar lines?
This part of a line has one endpoint and extends infinitely in one direction.
What is a ray?
The angle shown measures approximately135∘. This is its classification.
What is an obtuse angle?
Two angles measure 35∘and x∘ and are complementary. This is the value of x.
What is 55∘
A segment is divided into two equal parts by a bisector. If the whole segment measures 18 units, each part measures this many units.
What is 9 units?
Two or more lines that do not lie in the same plane are called these.
What are skew lines?
A figure is named by two points with arrows extending in both directions. This symbol identifies the figure.
What is a line?
An angle that measures exactly 90∘ has this classification.
What is a right angle?
Two angles measure 125∘ and x∘ and are supplementary. This is the value of x
What is 55∘
This line, segment, or ray intersects the midpoint of a segment at a right angle.
What is a perpendicular bisector?
Points A, B, and C lie on the same straight line, while points D and E lie on another line in the same plane. The relationship between points A, B, and C is this.
What are collinear points?