In a fraction, the number or algebraic expression written below the fraction line is called the denominator.

In computer technology, 2D graphics refer to computer-based digital image generation, that is, two-dimensional computer graphics; in everyday life and in math, it more often means flat shapes with only length and width and no thickness.

Generally, if A and B represent two polynomials, and B contains a variable, then the expression A / B is called a rational expression, where A is called the numerator and B is called the denominator.

The binomial distribution in statistics is a tool used to calculate the probability of a certain number of successes in a fixed number of trials, like how many times a coin will land heads up if you flip it 10 times. It requires that each trial has only two possible outcomes (success or failure), and that the probability of success is the same for each trial.

In math, a fraction refers to dividing the unit '1' into several equal parts, representing one or more of those parts.

Inverse proportion refers to two related quantities where if one changes, the other changes as well. If the product of the two corresponding numbers always stays the same, these two quantities are called inversely proportional.

Fraction multiplication is a way of doing math. You multiply the numerators together and the denominators together. If you can simplify, simplify first. You can't multiply the numerator by the denominator.

"Reflection" in math mainly refers to the mirror symmetry operation in geometric transformations, which means flipping points, lines, or shapes across a line (for plane reflection) or a point (for central symmetry) to create a congruent mirror image; this is a type of rigid (isometric) transformation. Also, in mathematical logic, the "reflection principle" is a deep concept in set theory about the consistency between a formal system and the models of its finite subsystems.

Fraction calculations mainly include the four basic operations: addition, subtraction, multiplication, and division, and each operation has clear rules.

Reflection symmetry is just mirror symmetry; an object can perfectly overlap with its original after being flipped along a line or plane.