Basic Definitions
Congruency
Anglish
Angle Pairs
Lines
100

Logical reasons used to confirm an idea.

What are proofs?

100

This is the halfway point that divides the segment into two congruent segments.

What is a midpoint?

100
This angle measures less than 90 degrees.
What is an acute angle?
100
These are two coplanar angles with a common side, a common vertex, and no common interior points.
What is adjacent angles?
100

These are two lines that intersect to form right angles.

What are perpendicular lines?

200

This is represented by a flat surface that extends without end and has no thickness.

What is a plane?

200
This is a point, line, ray, or other segment that intersects a segment at its midpoint.
What is a segment bisector?
200
This angle measures to 90 degrees.
What is a right angle?
200
These are two angles whose sides are opposite rays.
What are vertical angles?
200

This is a line, segment, or ray that is perpendicular to the segmnet at its midpoint.

What is a perpendicular bisector?

300

A statement that is accepted as fact, without proof.

What is a posulate?

300
This is formed by two rays with the same endpoint.
What is an angle?
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?
300

The point or line where lines or planes pass through or lie across each other

What is an intersection?

400

This shape has three sides, three angles, and three vertices.

What is a triangle?

400

This is the endpoint of the angle.

What is the vertex?

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?
400

This is part of a line that consists of two endpoints and all points between them.

What is a line segment?

500

This part of a line the starts at a point and extends infinitely in one direction

What is a rays?

500

Points that lie on the same plane

What is coplanar?

500
Angles with the same measure are...
What is congruent?
500
These are a pair of adjacent angles whose noncommon sides are opposite rays.
What are a linear pair?
500

This is represented by a straight path that extends in two opposite directions without end and has no thickness.

What is a line?

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