C

Capacity  A measure of the volume of a container.

Cardinal number The number obtained by counting the elements contained in a set

Cell Each section of a spreadsheet. A cell contains data, labels or formulas.

Center (of circle) A circle is the set of all points in a plane which are the same distance from a given point.

The given point is called the center of the circle

Center The point that lies equidistant from all points on a circle or a sphere.

Centigrade The temperature scale used as a standard scale in science and industry, on which the freezing point

of water is O' and the boiling point is 100°'

Central angle An angle whose vertex is the center of a circle and whose sides are determined by two radii of the circle

changing its shape or size.

Chord  A segment that joins two points on a circle.

Circle  A plane figure made up of all points that are the same distance from a given point in the plane.

Circumference  The perimeter of a circle.

Closed curve A curve whose representation begins and ends at the same Point

Closed curve A curve whose representation begins and ends at the same point

Closure property of addition (for whole numbers) The sum of any two whole numbers is a whole number

Closure property of addition (for whole numbers) The sum of any two whole numbers is whole number

Cluster Data that are grouped close together.

Clustering A method used to estimate decimal sums and differences by rounding a group of closely related numbers

to the same whole number.

Coefficients   The numbers preceding the powers of the variable in a polynomial.  In x  - x + , the coefficients are

and -. coincides exactly with a point on the other side.  A figure is symmetric with respect to a point 0 if for each

point A on the figure there is a point B on the figure for which 0 is the midpoint of AB.

Collinear points  Two or more points that lie on the same line.

Combination  An arrangement of a group of things in which order does not matter.

Common denominator A common multiple of the denominators of two or more fractions.

Common factor A common factor of two counting numbers is a whole number which

Common multiple A number which is a multiple of each of two or more numbers

Commutative operation An operation in which a change in order of numbers does not change the answer

Commutative property of addition For any numbers a and b, a + b = b + a.

Commutative property of multiplication For any numbers a and b, a x b = b x a.

Commutative property of multiplication The order in which two numbers are multiplied does not affect the product

Complementary angles Two angles whose sum is 90'.  Either angle is said to be the complement of the other

Complementary angles Two angles whose sum is 900.  Either angle is said to be the complement of the other

Complex fractions A fraction that has a fraction for its numerator or its denominator (or both)

Composite number Any whole number greater than one that has more than two factors.

Conditional probability   The probability that an event B will occur given that an event A has occurred.

Cone   A closed figure formed by a circular region and a curved surface that comes to a point.

Congruent angles Two angles that have the same measure.

Congruent figures Figures that have the same size and shape.

Congruent line segments Two or more line segments that are exactly the same length.

Congruent sides Sides that have the same measure.

Coordinate  The number paired with a point on the number line.

Coordinate plane   A plane marked with two perpendicular number lines, used to graph ordered pairs of  numbers.

Coordinate system Two perpendicular lines that intersect at their zero points to form a coordinate system.

Coplanar  Lying in the same plane.

Corresponding angles  One of four pairs of angles formed when two lines are cut by a transversal.

Cosine of an angle   If LA is one of the acute angles in a right triangle, the cosine of LA cos A is the ratio of the

length of the side adjacent to LA to the length of the hypotenuse.

Counterexample An example which shows that a general statement is false (59)

Counting numbers The set of positive integers which is represented by: C={1, 2, 3,…}

Cross product If the cross products in a ratio are equal then the ratio forms a proportion.  In the proportion

2/3 = 8/12, the cross products are 2 x 12 and 3 x 8.

Cube A rectangular solid having all its edges equal

Cup A unit of capacity equal to 8 fluid ounces.

Curve A set of points which can be represented on paper by one continuous mark without retracing

Cylinder   A geometric solid with two parallel bases that are congruent and one curved surface joining the bases.