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The math dictionary section bellow deals with all geometry terms starting with the letters 'C' and 'D'. As you can see we have a full geometry dictionary available for you to explore. Simply click on the tabs to find the math definitions you are looking for.
This resource, online is entirely free. However, if you would like to have a physical copy at home, off-line, for your student to have easy access to, please consider purchasing the e-book - Kindergarten to Sixth Grade Geometry Dictionary. For just $5.95 - it is excellent value! |
Calculate: Perform mathematical operations. | |||
Calculator: A device used to perform mathematical operations. | |||
Capacity: The amount a container can hold. | |||
Carroll diagram: A sorting diagram named after Lewis Carroll. | |||
Cartesian plane: Also called the coordinate plane. Contains two perpendicular axes - X-Axis and Y-Axis. Points are plotted taking a position from both the x and y axis. e.g. (3,10). | |||
Chord: A line segment connecting two point on a circles perimeter/circumference. | |||
Circle: A plane shape drawn by a line whose points are equidistant from a point. This point is known as the center point of the circle. | |||
Circumference: The distance around the circle. Calculated by: C = 2.Pi.r | |||
Clockwise: The direction the hands on an analogue clock move. | |||
Closed Curve: Any curve where it joins itself at its starting point. | |||
Cointerior angles: The inner angles on the SAME side of a line drawn through parallel lines. | |||
Co-linear: When objects are situated on the same line. | |||
Co-linear points: Three or more points that lie on the same line. | |||
Compass (construction): An instrument used to create circles. | |||
Complimentary angle: Two angles whose sum EQUALS 90 degrees. | |||
Concave: Curved inwards. The opposite of convex. | |||
Concave quadrilateral: A quadrilateral with at least one reflex angle. | |||
Concave Polygon: Any polygon with at least one reflex angle. | |||
Concentric Circle: Circles different in size, but share a center point. | |||
Cone: A solid shape composed of an circular or elliptical base, and a curved surface which tapers to a vertex. | |||
Congruent figures: A congruent figure has all equal sides and all equal angles. | |||
Converging lines: Lines that all head in the direction of the same point. | |||
Convex: Curved outwards - the opposite of concave. | |||
Convex Quadrilaterals: A quadrilateral where no angles are greater than 180 degrees (reflex). | |||
Coordinates: Pairs of letters or numbers indicating a points position on the Cartesian/coordinate plane. They are always indicated with the x-axis value first, then the y-axis. e.g. (4,7) | |||
Coordinate plane: Same as Cartesian Plane | |||
Coplanar: Geometric objects that exist on the same plane. | |||
Corner: The points where surfaces/vertices meet. | |||
Corresponding angles: Angles that have the same position created by one line intersecting two or more parallel lines. | |||
Counter Clockwise: Same as anti clockwise. | |||
Cross Section: The face that results when a solid shape is cut. | |||
Cube: A solid shape whose form is created by 6 congruent squares. Also one of the 5 Platonic Solids. | |||
Cubic: The term used when describing a unit of volume. | |||
Cuboid: A right prism created by six rectangular faces. If all faces are square it is called a cube. | |||
Curve: A line that is NOT straight. | |||
Cyclic Quadrilaterals: A quadrilateral where a circle can be circumscribed to contain all four vertices. | |||
Cylinder: A solid shape composed of two congruent circles and one curved surface. | |||
Deca: Prefix meaning 10. | |||
Decagon: A 10 sided polygon. | |||
Decahedron: A Polyhedron with 10 faces. | |||
Decrease: To make smaller in size. | |||
Deduct: To subtract or take away. | |||
Degree (angle): The unit which angles are measured by. | |||
Diagonal: A line joining two NON-adjacent vertices. | |||
Diameter: A line connecting two points of a circle, which also includes the center point of the circle. | |||
Diamond: A plane shape with 4 equal sides and NO right angles. Also known as a Rhombus. | |||
Distance: The length between two points or objects. | |||
Divisible: Can be divided without a remainder. | |||
Dodeca: Prefix for 12. | |||
Dodecagon: A polygon with 12 straight edges. | |||
Dodechedron: A Polyhedron with 12 faces. |
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