Geometry

Lines

100

two lines that are the same distance apart and will never touch

What are parallel lines?

200

A figure that goes on forever in two directions

What is a line?

300

this has one endpoint and continues in one direction forever

What is a ray?

400

Two or more points on the same line

What is Collinear?

500

lines that intersect to form a right angle

What are perpendicular lines?

Angles

100

This is the term for a 90 degree angle

What is right angle

200

An angle that is less than 90 degrees

What is acute

300

an angle that is greater than 90 degrees

What is obtuse

400

this is the number of degrees in a straight angle

What is 180 degrees

500

This is used to measure angles

What is a protractor

Angle Relationships

100

Two angles that are opposite each other and congruent

What are vertical angles?

200

Two angles that are adjacent (next) to each other on the same line.

What are linear pair angles?

300

Two or more angles that add up to 90 degrees. 

What are complementary angles?

400

Two or more angles that add up to 180 degrees

What are supplementary angles?

500

Two angles that are right next to each other

What are adjacent angles?