C.P. Geometry Chapter 1 Test Review

Vocabulary flashcards covering key geometry terms from the Chapter 1 Test Review.

Point

A precise location in space with no size; it has no dimensions, only position.

Line

A straight path that extends indefinitely in opposite directions; has no endpoints.

Collinear

Describes three or more points that lie on the same line.

Coplanar

Describes points, lines, or figures that lie in the same plane.

Intersect

To cross or meet at a point.

Noncollinear

Describes points that do not lie on the same line.

Noncoplanar

Describes points, lines, or figures that do not lie in the same plane.

Segment

Part of a line with two endpoints.

Midpoint

The point that divides a segment into two congruent segments; coordinates are the average of endpoints.

Distance

The length of a segment joining two points; in the coordinate plane, d = sqrt((x2 − x1)^2 + (y2 − y1)^2).

Coordinate

An ordered pair (x, y) that identifies a point's position on the Cartesian plane.

Distance Formula

d = sqrt((x2 − x1)^2 + (y2 − y1)^2), used to find the distance between two points.

Vertex

The common endpoint of two rays forming an angle; the 'corner' of an angle.

Angle

The figure formed by two rays with a common endpoint (vertex).

Acute angle

An angle measuring less than 90 degrees.

Obtuse angle

An angle measuring more than 90 degrees but less than 180 degrees.

Right angle

An angle measuring exactly 90 degrees.

Straight angle

An angle measuring exactly 180 degrees; represents a straight line.

Angle Addition Postulate

The measure of a larger angle equals the sum of the measures of two adjacent, nonoverlapping angles that form it.

Bisect

To divide a segment, angle, or line into two congruent parts.

Congruent

Exactly equal in size or measure; used for segments or angles.

Bisector

A line, segment, or ray that divides a geometric figure into two congruent parts.

Coordinate plane

A two-dimensional plane defined by perpendicular axes (x and y) where points are represented by ordered pairs (x, y).