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 xaxis and yaxis

cc 
cubic centimetre. 1 cc = 1ml 
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 = 10ml 
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 100cm in a metre, and there are 10mm in 1 cm 
coefficient 
the number in front of a pronumeral. example: the coefficient of x in 10x is 10. The coefficient of x^{2} in 5x^{2} – 2x + 3 is 5, and the coefficient of x is 2 
cointerior angles 
cointerior 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}/_{3}πr^{2}h SA = πr^{2} + 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 
constant 
the number in an algebraic statement with no pronumeral. eg 3x^{2} + 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 
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 = πr^{2}h SA = 2πr^{2} + 2πrh
