Online Math Dictionary: C
Easy to understand math definitions for KAlgebra mathematics
Just scroll down or click on the word you want and I'll scroll down for you!
Cartesian Coordinates (Read the definition below of Cartesian plane first) Coordinates on the Cartesian plane are a set of numbers officially called "an ordered pair" that are in the form ( x , y ) ... The x guy is how far to the right or left you've counted over... and the y guy is how far up or down you've counted. For more info on graphing with Cartesian coordinates, check out my Plotting Points lesson. 
















Coefficient In a polynomial, the coefficients are the numbers that are right in front of the letters (the variables.) Examples: In 5x3y, the coefficients are 5 and 3.... x+7 is really 1x+7 and the coefficient is 1. For more info on coefficients, check out my algebra lesson on Polynomials. 



Combinations Combinations count how many different ways you can choose things from a set of objects. Example: If you have three employees (A, B and C) and you want to form a committee of two, how many different ways can you do it? 3 ways... A and B A and C B and C For more info, check out my Combinations lesson. 

Combinatorics Combinatorics is the study of counting. For more info, check out my Combinatorics lessons. 

Commutative Property of Addition The commutative property of addition is a math rule that is always true. Here it is with letters: a + b = b + a This rule just says that, when you are doing addition, it doesn't matter which order the numbers are in. You can add aand b OR you can add b and a ... and you'll get the same answer. Here it is with numbers so you can check this for yourself! 2 + 3 = 3 + 2 NOTE: This does not work with subtraction! 

Commutative Property of Multiplication The commutative property of multiplication is a math rule that is always true. Here it is with letters: a x b = b x a This rule just says that, when you are doing multiplication, it doesn't matter which order the numbers are in. You can multiply a and b OR you can multiply b and a ... and you'll get the same answer. Here it is with numbers so you can check this for yourself! 2 x 3 = 3 x 2 NOTE: This does not work with division! 





Complex Numbers Before you hit algebra (and through most of algebra), you work with the Real Number System which is just all those regular numbers you're used to working with: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. This includes fractions, decimals and radicals made from these numbers. BUT, there is another number system out there! No, not THAT! Yes, it's all too true... It's the Complex Number System where a complex number is in the form: In higher math, you can do arithmetic, algebra and more with these goofy numbers. AND you can make very cool computer art with them  Fractals. Check out my fractal gallery to learn more. For more info on complex numbers, check out my algebra lessons on complex numbers. 

Composite A number is composite if it has more than two factors. The number 20 is composite since it has more than two factors: 1, 2, 4, 5, 10, 20. The number 5 is NOT composite since it only has two factors: 1 and 5. The number 5 isprime. The number 1 is neither prime nor composite since it only has one factor: 1. 







Conjugate You'll see conjugate pairs when working with radicals and complex numbers. I like to call them conjugate buddies, because they usually need to be with their friend in an algebra problem. Conjugate buddies are the same, but with the opposite sign. Here are two examples: For more info on conjugates and how the complex kind are used in Algebra, check out my lesson on complex zeros. 

Consecutive Consecutive just means one right after the other. Example: A list of consecutive whole numbers: 0, 1, 2, 3, 4, 5, 6, ... Example: A list of consecutive even whole numbers: 0, 2, 4, 6, 8, ... Example: A list of consecutive odd whole numbers: 1, 3, 5, 7, 9, ... 





Coplanar Any objects that lie in the same plane are called coplanar. 





Cramer's Rule Cramer's Rule is a method in algebra to solve systems of equations. For more info on Cramer's Rule, check out my full lessons: Cramer's Rule for 2x2 Systems and Cramer's Rule for 3x3 Systems 



Cubic Equation Used in Algebra, the critter below is cubic because of the x cubed and an equation because of the equal sign. 

Cubic Polynomial Used in Algebra, the critter below is a cubic polynomial because of the x cubed. For more info on polynomials, check out my lesson, What's a Polynomial? 




A  B  C  D  E  F  G  H  I  no J's 
K  L  M 
N  O  P  Q  R  S  T  U  V  W  no X's 
no Y's 
no Z's 