Geometry Vocabulary
Classifying Angles
Lines
Polygons
Unknown Angles
100

A line that has two endpoints. 

What is a line segment 

100

An angle that measures 90 degrees

What is a right angle

100

Lines that never intersect and have the same distance between them. 

Parallel Lines 

100

A four sided shape 

What is a quadrillateral

100

The sum of 2 angles is 87 degrees. One of the angles measures 60 degrees. What does the unknown angle measure? 

what is 27 degrees

200

A line that goes on in both directions. 

What is a line

200

Angles that measure less than 90 degrees

What are acute angles 
200

Lines that intersect and create a 90 degrees angle. 

What are perpendicular lines 

200

A five sided shape 

What is a pentagon

200

The angle formed when the minute hand is on the 12 and the hour hand is on the 3. 

What is 90 degrees
300

A line with 1 endpoint and extends indefinitely in one direction.

What is a ray

300

Angles that measure greater than 90 degrees 

What are obtuse angles 

300
Lines that intersect and do not create a right angle. 

what are intersecting lines 

300

A six sided shape

What is a hexagon

300

Two angles form a greater angle. The measures of those angles are 30 degrees and 90 degrees. What does the greater angle measure? 

What is 120 degrees

400

An exact location ( . typically labeled with a letter) 

What is a point

400
What a full circle measures 

360 degrees 

400

Name these lines: 

______________________________

______________________________

What are parallel lines 
400

An 8 sided shape 

What is an octagon 

400

What angle is created when you cut a 90 degree angle in half? 

What is a 45 degree angle? 

500

Two rays sharing a common endpoint create

What is an angle
500

What a line measures 

180 degrees

500
                          +


Name these lines 

What are perpendicular lines 

500

A 3 sided shape

What is a triangle 

500

Two angles form a straight line. One angle measures 137 degrees. What is the measure of the other angle? 

What is 43 degrees