Show:
Lines
Angles
Points and Planes
Symbols
100
Lines that cross in exactly one point
What are intersecting lines?
100
It's measure is greater than 90 degrees, but less than 180 degrees.
What is an obtuse angle?
100
This is a location. It has no size.
What a point?
100

Identify the symbol    ||

What is the symbol for parallel?

200
Lines that are coplanar and never intersect
What are parallel lines?
200

These angles sum to 180 degrees.

What are supplementary angles?

200
This a series of points that extends in two opposite directions without end.
What is a line?
200

Identify the symbol    ⊥ 

What is the symbol for perpendicular?

300
Lines that are noncoplanar
What are skew lines
300
Two angles whose measures have a sum of 90
What are complementary angles?
300

This is a flat, two-dimensional surface that has no thickness

What is a plane?

300

Identify the symbol   ∠

What is the symbol for angle?

400
Lines that intersect to form four right angles
What are perpendicular lines?
400

Two coplanar angles with a shared ray, a shared vertex, but no shared interior points

What are adjacent angles?

400
These lie on the same line
What are collinear points?
400

Identify the symbol    → 

What is the symbol for a ray?

500
Part of a line consisting of two endpoints and all the points between them.
What is a line segment?
500

Two angles opposite one another at the intersection of two lines.

What are vertical angles?

500

This is a mathematical rule that has been proved to be true.

What is a theorem?

500

Identify the symbol    ↔ 

What is the symbol for a line?