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.
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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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