ConeA 3D shape consisting of a circular base, a vertex (point) in a different plane, and line segments joining all the points on the circle circumference to the vertex. |
Congruent (shapes)Adjective describing two or more geometric figures that are the same in every way except their position in space. Example: Two figures, where one is a reflection of the other, are congruent since one can be transposed onto the other without changing any angle or edge length. Noun: congruence. |
ConsecutiveFollowing in order. Consecutive numbers are adjacent in a count. Examples: 5, 6, 7 are consecutive numbers. 25,30,35 are consecutive multiples of 5. In a polygon, consecutive sides share a common vertex and consecutive angles share a common side. |
Constant (noun)A number or quantity that does not vary. Example: in the equation y = 3x + 6, the 3 and 6 are constants, whereas x and y are variables. |
Continuous DataData arising from measurements taken on a continuous variable (examples: lengths of caterpillars; weight of crisp packets) that can take on an infinite or effectively infinite set of values. Compare with discrete data. |
ConvexAdjective to describe a line or surface that describes outwards, like the shape of a circle. . A convex polygon has all its interior angles less than or equal to 180 degrees |
CornerIn elementary geometry, a point where two or more lines or line segments meet. Also called a vertex, or vertices (plural). Example: a rectangle has 4 vertices; a cube has 8. |
CorrelationA measure of the strength of the association between two variables. High correlation implies a close relationship and low correlation a less close one. If an increase in one variable results in an increase in the other, then the correlation is positive. Example: there should be a positive correlation between your understanding of maths and your enjoyment of it. If an increase in one variable results in a decrease in the other, then the correlation is negative. The term zero correlation does not necessarily imply no relationship, but merely no linear relationship. |
Corresponding AnglesWhere two straight-line segments are intersected by a third, as in the diagrams, the angles a and e are corresponding. Similarly b and f, c and g and d and h are corresponding. Where parallel lines are cut by a straight line, corresponding angles are equal. |
Cross-sectionIn geometry, a section in which the plane that cuts a figure is at right angles to an axis of the figure. Example: In a cube, a square is revealed when a plane cuts at right angles through a face. |