Basic Definitions
Anglish
Angle Pairs
100

Goes on forever in both directions

What is a line?

100
This angle measures less than 90 degrees.
What is an acute angle?
200

2 lines that form a right angle(a perfect T)

What is a Perpendicular line?

200
This angle measures to 90 degrees.
What is a right angle?
300

Two straight lines that will never cross or intersect.

What are parallel lines?

300
This angle measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
300
These are two angles whose measures have a sum of 90 degrees.
What are complementary angles?
400

Goes on forever on only 1 direction.

What is a ray?

400
This angle measures 180 degrees.
What is a straight angle?
400
These are two angles whose sum is 180 degrees.
What are supplementary angles?
500

Has 2 endpoints, it stops.

What is a line segment?

500
Angles with the same measure are...
What is congruent?
M
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