# Important Geometry Stuff

## 10 terms

### Collinear points

Points that lie on the same line.

### Noncollinear Points

Points that do not lie on the same line.

### Line Segment

Part of a line consisting of two points, called end points, and the set of all points between them.

### Congruent Line Segments

Line segments that have equal lengths.

### Betweenness of Points

If F, G, and H are collinear, and if FG+GH=FH, then G is between F and H.

### Ray

Part of a line consisting of a given point, called the end point, and the set of all points on one side of the end point.

### Angle

The union of two rays having the same end point. The end point is called the vertex of the angle; the rays are called the sides of the angle.

### Congruent angles

Angles that have equal measures.

### Betweenness of Rays

Ray PS is between ray PQ and ray PR, if point S lies in the interior of angle QPR and measurement of angle SPR plus measurement of angle QPS equals measurement of angle QPR

### Right Angle

An angle with a measure of 90