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Intro. to Geometry
Angles
Classifying Angles
Misc.
Anything Goes
100
A position in space represented by a dot and labeled with an uppercase letter.
What is a point?
100
Two rays with a common endpoint.
What is an angle?
100
An angle whose measure is exactly 90 degrees.
What is a right angle?
100
A flat surface that extends without end in all directions.
What is a plane?
100
Two angles whose sum is 90 degrees.
What are complementary angles?
200
Extends without end in two opposite directions.
What is a line?
200
The endpoint of the rays in an angle.
What is a vertex?
200
An angle whose measure is exactly 180 degrees.
What is a straight angle?
200
Lines that meet at a point.
What are intersecting lines?
200
Two angles whose sum is 180 degrees.
What are supplementary angles?
300
Part of a line with one endpoint and extends in one direction.
What is a ray?
300
Tool used to measure angles.
What is a protractor?
300
An angle whose measure is less than 90 degrees.
What is an acute angle?
300
Lines that never meet.
What are parallel lines?
300
The complement to a 75 degree angle.
What is a 15 degree angle?
400
A point that marks and end of a segment or ray.
What is an endpoint?
400
Unit in which angles are measured.
What are degrees?
400
An angle whose measure is between 90 and 180 degrees.
What is an obtuse angle?
400
Lines that do not touch, but are not parallel.
What are skew lines?
400
The supplement to a 152 degree angle.
What is a 28 degree angle?
500
Part of a line that consists of two endpoints and all points in between.
What is a segment?
500
Plural for vertex.
What are vertices?
500
An angle whose measure is greater than 180 degrees.
What is a reflex angle?
500
Opposite (and congruent) angles that are formed when two lines intersect.
What are vertical angles?
500
When naming an angle with three letters this must be in the middle.
What is the vertex?