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 = 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 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 linescointerior
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
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
corresponding angles corresponding angles in parallel lines are equal and form an “F” shape corresponding
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


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