Geo R Unit 1 Vocabulary

Front

Point

Back

1. A physical location in space. It has zero dimensions and is often represented by a very small filled in circle and capital letter.

Front

Line

Back

A continuous collection of points that extends forever in two directions.

Front

Segment

Back

A continuous set of points that lie on a given line between two points on the line. Line segments are named using their two endpoints.

Front

Collinear

Back

Front

Circle

Back

The set of all points that lie the same distance (equidistant) from a given point called the center of the circle. Often named using their center point.

Front

Radius

Back

Any line segment drawn from the center of the circle to any point on the circle.

Front

Diameter

Back

Any line segment drawn from one point on a circle to another point on a circle that passes through the center of the circle.

Front

Arc

Back

Continuous portions of a circle designated by two or three points on the arc.

Front

Ray

Back

A continuous set (collection) of points that lie along a line that have a starting point but no ending point. The starting point is known as its vertex. They are named by stating their vertex (starting point) followed by any other point it passes through.

Front

Angle

Back

The union of two distinct rays with a common vertex (starting point). Named using just the vertex or a triple of points where the second letter is the vertex of the angle and the other two letter represent points on the two rays that make up the angle.