
Mathematical
"C" Words capacity The number of unit cubes or parts of unit cubes that can be fit into a solid. Also called volume. cartesian
plane
Name given to the plane containing points identified as ordered pairs
of real numbers. Also called coordinate plane. center
of a circle
The given point from
which the set of points of the circle are all at the same distance.
center
of a regular polygon
The point equidistant from the vertices. center
of a sphere
The given point from which the set of points of the sphere are all the
same distance.
center of symmetry For a rotationsymmetric figure, the center of a rotation that maps the figure onto itself. centi A prefix meaning 1/100. central
angle of a circle
An angle with its vertex at the center of the circle.
centroid
of a triangle
The point at which all medians of a triangle intersect.
certain event An event with a probability of 1. chord
A segment whose endpoints are on a given circle. circle
The set of points in a plane that are equidistant from a given point known
as its center.
circle
graph A
graph in which information is represented using a circle that is cut into
sectors to show values of a particular category. Also called a pie
graph. circularity The "circling back" that sometimes occurs when one tries to define basic terms; returning to the word which one is trying to define. circumference The
perimeter of a circle, which is found by multiplying its diameter times
pi. clockwise
The direction around a circle in which the hands on a clock usually move. clockwise orientation The orientation "walking" around a figure keeping its interior to the right. clockwise rotation The direction in which the hands move on a nondigital clock, designated by a negative magnitude. coefficient The number by which a certain variable in a term is multiplied.
coincide To occupy the same position. coincident lines Lines that contain exactly the same points. We like to think that they lie on top of each other. collinear points Points that lie on the same line. column
A vertical line of objects in a rectangular array. common denominator A multiple of all the denominators in a problem.
common tangent A line which is tangent to two or more distinct circles. Commutative
Property of Addition
For any numbers a
and b:
Commutative
Property of Multiplication
For any numbers a and b:
Comparison Model for Subtraction x  y is how much more x is than y. compass An instrument for drawing circles. complementary angles Two angles the sum of whose measures is 90. composite number Any positive integer exactly divisible by one or more positive integers other than itself and 1.
concentric
circles
Two or more circles that lie in the same plane and have the same center. conclusion The "then" clause of a condition. The result of a deduction in a proof. Also called consequent. concurrent Two or more lines that have a point in common. conditional A statement of the form If... Then....
cone The surface of a conic solid whose base is a circle. congruence transformation A transformation that is a reflection or composite of reflections; also called an isometry. congruent figures Figures with the same size and shape. Figures which are the image of each other under a reflection, rotation, or translation, or combination of these. conic solid The set of points between a given region (its base), together with the vertex and the base. conic
surface
The boundary of a conic solid. conjecture An educated guess or opinion. consecutive
angles
In a polygon, two angles whose vertices are endpoints of the same side. consecutive sides In a polygon, two sides with an endpoint in common. consecutive vertices In a polygon, endpoints of a side. consequent The "then" clause of a conditional, also called the conclusion. construction A drawing which is made using only an unmarked straightedge and a compass following certain prescribed rules. continuous A figure made up of points with no space between them. contraction A size change with a magnitude between 0 and 1. contradiction A situation in which there exist contradictory statement(s). contradictory statements Two statements that cannot both be true at the same time. contrapositive A conditional resulting from negating and switching the antecedent and consequent of the original conditional. convenient location A general location for a figure on a coordinate plane in which its key points are described with the fewest possible variables. converse The conditional statement formed by switching the antecedent and consequent of a given conditional. conversion
factor A
factor by which one unit can be converted to another. convex
polygon A
polygon in which no diagonals lie outside the polygon. convex set A set in which every segment that connects points of the set lie entirely in the set. coordinate The number or numbers associated with the location of a point on a line, a plane, or in space. coordinate
axes
A pair of perpendicular coordinatized lines in a plane that intersect
at the point with coordinate 0; three mutually perpendicular coordinatized
lines in space that are concurrent at the point with coordinate 0. coordinate graph Displaying points as ordered pairs of numbers. coordinate
plane
Name given to the plane containing points identified as ordered pairs
of real numbers. Also called cartesian plane. coordinatized line A line on which every point is identified with exactly one number and every number is identified with a point on the line. coplanar Figures that lie in the same plane. corollary A theorem that is easily proven from another theorem. corresponding
angles Any
pair of angles in similar locations in relation to a transversal intersecting
two lines.
corresponding
parts
Angles or sides that are images of each other under a transformation. corresponding
sides
Any pair of sides in the same relative positions in two similar figures.
cosine
of an angle
The ratio leg adjacent to the angle divided by the hypotenuse in a right
triangle. Abbreviated cos. count A number of particular things. counterclockwise
The direction around a circle opposite from that in which the hands of
a clock move. counterclockwise orientation The orientation "walking" around a figure keeping its interior to the left. counterclockwise rotation The direction opposite that which the hands move on a nondigital clock, designated by a positive magnitude. counterexample A specific case of a conditional for which the antecedent is true but the consequent is false. An example which shows a conjecture to be false. counting
unit The
name of the particular things being tallied in a count. cube A threedimensional figure with six faces, each face being a square cube
root
A real number x is the cube root of a real number y, written cubic units Units for measuring volume. cylinder
The surface of a cylindric solid whose base is a circle. cylindric
solid
The set of points between a region (its base) and its translation image
in space, including the region and its image.
