Basic Definitions

Congruency

Anglish

Angle Pairs

Lines

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

What is a line?

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

What is a midpoint?

This angle measures less than 90 degrees.

What is an acute angle?

These are two coplanar angles with a common side, a common vertex, and no common interior points.

What is adjacent angles?

These are two lines that intersect to form right angles.

What are perpendicular lines?

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

What is a plane?

This is a point, line, ray, or other segment that intersects a segment at its midpoint.

What is a segment bisector?

This angle measures to 90 degrees.

What is a right angle?

These are two angles whose sides are opposite rays.

What are vertical angles?

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

What is a perpendicular bisector?

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

What is a segment?

This is formed by two rays with the same endpoint.

What is an angle?

This angle measures more than 90 degrees but less than 180 degrees.

What is an obtuse angle?

These are two angles whose measures have a sum of 90 degrees.

What are complementary angles?

The ratio of the vertical change to the horizontal change between any two points.

What is the slope?

This is part of a line that consists of one endpiot and all the points of the line on one side of the endpoint.

What is a ray?

This is the endpoint of the angle.

What is the vertex?

This angle measures 180 degrees.

What is a straight angle?

These are two angles whose sum is 180 degrees.

What are supplementary angles?

This form of an equation of a nonvertical line is y=mx+b.

What is slope intercept form?

These are two rays that share the same endpoint and form a line.

What is opposite rays?

This is a ray that divides an angle into two congruent angles.

What is an angle bisector?

Angles with the same measure are...

What is congruent?

These are a pair of adjacent angles whose noncommon sides are opposite rays.

What are a linear pair?

The form of an equation of a nonvertical line is y-y1=m(x-x1).

What is the point slope form ?

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