C
Term |
Definition |
| C | Roman Numeral for 100 |
| calculate | to work out an answer |
| capacity | liquid amount a container can hold. Usually measured in litres, millilitres or cubic centimetres (cc) |
| cardinal number | the number which shows how many things are in a set or group. eg if there were 2 maths books and 3 novels, then the cardinal would be 5 since there are 5 books |
| Cartesian number plane | the number plane with x-axis and y-axis 
|
| cc | cubic centimetre. 1 cc = 1 mL |
| celsius | measure of temperature. 0° is freezing, 100°C is boiling point for water. C = 5/9(F – 32) to convert from Fahrenheit |
| cent | unit of money, there are 100 cents in a dollar |
| centi | prefix of units indicating one hundredth eg. centilitre is 1 CL = 10 mL |
| centre | middle |
| century | 100 |
| chord | a line going from one side of a circle to the other, but not through the centre
|
| circle | perfectly round plane shape
|
| circumcentre | is the point where the perpendicular bisectors of the sides of a triangle intersect, finding the ‘centre’ of a triangle |
| circumference | distance, or perimeter, of a circle. C = 2πr or C = πd |
| clockwise | normal movement of a clock in circular motion to the right |
| cm | centimetre – there are 100 cm in a metre, and there are 10 mm in 1 cm |
| coefficient |
the number in front of a pronumeral. example: the coefficient of x in 10x is 10. The coefficient of x2 in 5x2 – 2x + 3 is 5, and the coefficient of x is -2 |
| co-interior angles | co-interior angles in parallel lines are supplementary: add to 180° and lie on the same side of the transversal, inside the parallel lines |
| collinear | points all lying on the same line
|
| common factor | a factor that will fit into two or more terms |
| complementary angles | angles that add to 90º |
| complementary events | events that make up the entire range of probability and whose combined probabilities add to 1 |
| composite number | a number with more than two factors |
| compound interest | when interests accumulates and the interest is added to the principal, not just paid on the original amount. A = P(1 + r/100)n where: A = amount investment has compounded to, P = principal amount invested, r = interest rate per period, n = number of periods |
| concave polygon | a polygon with a reflex angle |
| concentric circles | two circles sharing the same centre |
| concurrent lines | lines that all go through the same point
|
| cone | a solid shape with a circle as a base and a sector of a circle sometimes called a circular pyramid V =1/3πr2h SA = πr2 + πrl where l is slant height |
| congruence tests | AAS (angle, angle, side) SSS (side, side. side) SAS (side, angle, side) RHS (right, hypotenuse, side) |
| congruent | when shapes are exactly identical in every respect, they are congruent |
| conjugate angles | two angles that add to 360º |
| conjugate surds | (√a + √b) has a conjugate of (√a – √b) where one has a positive and one is a negative |
| consecutive | in a row eg 5, 6, 7 |
| constant | the number in an algebraic statement with no pronumeral. eg 3x2 + 5x – 3 has a constant of -3 |
| continuous | a line or curve that has no break in it |
| converging geometric sequence | a geometric sequence where -1 < r < 1 |
| converse | the opposite to. eg: the converse of 5 + 7 = 12 is 7 = 12 – 5 |
| convex polygon | a polygon with no reflex angle (most commonly, polygons are convex) |
| coordinate | ordered pair on a number plane: (x, y) |
| correlation | relationship between two variables. Correlation ranges from -1, negative correlation, 0, no correlation to 1 a positive correlation. The correlation co-efficient is indicated with the letter r. |
| corresponding angles | corresponding angles in parallel lines are equal and form an “F” shape
|
| cos | abbreviation of cosine cos θ = opp/hyp |
| cosec | cosec θ = 1/sin θ |
| cosine | trig ratio cosine θ = opp/hyp |
| cost price | price paid for an article or service |
| cot | abbreviation of cotangent, and inverse of tan θ, cot θ = 1/tan θ |
| cotangent | inverse of tan θ, cot θ = 1/tan θ |
| counting number | 1, 2, 3, 4, 5….. counting numbers are the positive integers |
| cylinder | prism, a solid shape consisting of two circles and a curved surface of rectangle V = πr2h SA = 2πr2 + 2πrh  |
