Download - Geometry: Chapters 1-3 Vocabulary
GEOMETRYCHAPERS 1-3VOCABULARY
POINT
The basic unit of Geometry;
has no size and is labeled with capital letters
LINE
A series of points that extends without end in
two directions
PLANE
A flat surface that extends without end in all
directions.
COMPASS
A tool used to draw arcs and circles.
PERIMETER
The distance around a figure.
AREA
The number of square unites needed to cover a
figure’s surface.
WHOLE NUMBERS
Numbers that include zero and the counting numbers
INTEGERS
Zero, positive numbers, and negative numbers
RATIONAL NUMBERS
Any number that can be written as a fraction (a/b)
EQUATION
A statement that includes the symbol =
MIDPOINT
Separates a segment into two segments of equal
length
COORDINATE PLANE
The grid used to locate points in a plane
ORDERED PAIR
The coordinates of a point that locates the point on
the coordinate plane
OPPOSITE RAYS
Two rays that are part of the same line and have only their endpoints in
common.
ANGLE
A figure formed by two noncollinear rays that
have a common endpoint.
VERTEX
The common endpoint of an angle
DEGREES
The unit used to measure angles
RIGHT ANGLES
An angle measuring exactly 90°
ACUTE ANGLES
An angle measuring less than 90°
OBTUSE ANGLES
An angle measuring more than 90°
ANGLE BISECTOR
A ray that bisects the angle
LINEAR PAIR
Two angles that share a vertex and have a common side, while the noncommonsides form a straight line. The angles add up to 180°
SUPPLEMENTARY ANGLES
Two angles whose measures add up to 180°
COMPLIMENTARYANGLES
Two angles whose measures add up to 90°
CONGRUENT ANGLES
Angles that have the same measure