1. The “Math-abet” Book
By Terrence Bomar

2. A
Asymptote
a straight line or curve A to which another curve B (the one being studied) approaches closer and closer as one moves along it.

3. B
Base
The bottom of a plane figure or three-dimensional figure.

4. C
Constant
A term that has only one number and no variables because it doesn’t vary
In the expression: 2a+3b+6
6 is the constant

5. D
Decimal
A linear array of digits that represents a real number, every decimal place indicating a multiple of a negative power of 10.
“ . “
For example, the decimal 0.1 = 1/10, 0.12 = 12/100, = 3/1000. Also called decimal fraction.

6. E Expression 2 x 3 + 7 2 × y + 5 2 + 6 × (4 - 2)
An expression is a mathematical statement that may use numbers, variables, or both. 2 x
3 + 7
2 × y + 5
2 + 6 × (4 - 2)

7. F
Fractions
a number, such as 2/3 or 3/8, that is not a whole number but that is formed by dividing one quantity by another. The top number of a fraction is called the numerator, while the bottom number is called the denominator.

8. G
Googol
the large number 10 to the 100th power, that is, the digit 1 followed by one hundred zeros (in decimal representation).
10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.

9. H
Histogram
A bar graph of a frequency distribution in which the widths of the bars are proportional to the classes into which the variable has been divided and the heights of the bars are proportional to the class frequencies.

10. I
Infinity
the idea of "without end" or "bigger than the biggest thing you can think of, unboundedness

11. J
Joint Variation
a variation in which y varies jointly as x or powers of x (x^n) and y or powers of z (z^n), if there is some nonzero constant k such that y = kx^nz^n , where x ≠ 0, z ≠ 0, and n > 0.
For example:
y = 7xz, here y varies jointly as x and z.
y = 11x^2z^3, here y varies jointly as x^2 and z^3 .

12. K Kappa (K, k) The 10th letter of Greek alphabet
Αα-alpha Νn-nu Ββ-beta Ξξ-xi Γgamma Οο-omicron Δδ-delta Ππ-pi Εε-epsilon Κκ-kappa Ρρ-rho Ζζ-zeta Σ-sigma Ηη-eta Ττ-tau Θθ-theta Υυ-upsilon Ιi-iota Φφ-phi Χχ-chi Λλ-lambda Ψψ-psi Μμ-mu Ωω-omega 

13. L
Line Segment
Two points on a line, and all the points between those two points.

14. M
Mean
The mean of a set of numbers is their average. You find the average of a set of numbers by adding them up and dividing by the number of numbers you have.
= -- = 5

15. N
Numerator
the top part of a fraction

16. O
Obtuse Angle
an angle greater than 90 degrees

17. P
Polynomials
a mathematical expression consisting of the sum of a number of terms, each of which contains a constant and variables raised to a positive integral power
(a+b) 2 = a 2 + 2ab + b 2
(a+b)(c+d) = ac + ad + bc + bd

18. Q
Quadratic Formula
a conic section generated by the intersection of a right circular conical surface and a plane parallel to a generating straight line of that surface.

19. R
Real Numbers
the numbers we use to measure real-world quantities such as temperature, volume, or length.
The number line is a model of a set of real numbers

20. S
Slope
the measurement of the steepness, incline, gradient, or grade of a straight line.

21. T
Trapezoid
a quadrilateral with at least 2 opposite sides parallel

22. U
Union
The union of two sets is everything in both sets. The symbol for union is a capital U.
U {3,4,5} {5,6,7} = {3,4,5,6,7}

23. V
Variable
A letter that stands for a number in a mathematical expression because its value can vary
In the expression 4n+7, n is the variable

24. W
Whole Numbers
The set of numbers that includes zero and all of the natural numbers.

25. X
X-intercept
The value of x at the point where a line or curve crosses the x-axis.

26. Y
Y-axis
The vertical axis in a Cartesian coordinate system.

27. Z
Zero
The additive identity; the number that, when added to another number n, gives n.