FAQ Math 45

What is a Non-Function in Math?

A non-function in math is a relation where a single input corresponds to more than one output. For example, in the relation $y^2 = x$, each $x$ value has two corresponding $y$ values, so it’s not a function.

What is a Normal in Maths?

In geometry, a normal is a line or vector that is perpendicular to a surface at a given point. For example, the normal to a curve at a particular point is a line perpendicular to the tangent at that point.

What is a Number Line in Math?

A number line is a visual representation of numbers arranged in order along a straight line. It includes positive numbers, negative numbers, and zero, often used to illustrate addition, subtraction, and absolute value.

What is a Number Sentence in Math?

A number sentence is a mathematical statement that includes numbers, operations, and an equal sign. For example, $3 + 4 = 7$ is a number sentence.

What is a Numeral in Math?

A numeral is a symbol or group of symbols used to represent a number. For example, 5 is a numeral that represents the number five.

What is a Pictogram in Maths?

A pictogram is a chart that uses pictures or symbols to represent data. Each picture represents a certain number of items, making it easy to visualize data.

What is a Plane Figure in Math?

A plane figure is a two-dimensional shape, such as a circle, triangle, or rectangle, that lies on a flat surface.

What is a Radian in Math?

A radian is a unit of angular measure in math, used to describe angles. One radian is the angle formed when the radius of a circle is wrapped around its circumference.

What is a Radical in Maths?

A radical is a symbol used to represent the root of a number. For example, $\sqrt{25} = 5$, and the radical symbol (√) indicates a square root.

What is a Rate in Math?

A rate is a ratio that compares two quantities of different units, such as speed (distance per time) or interest rate (percentage per year).

What is a Rational Number in Math?

A rational number is any number that can be expressed as a fraction $\frac{a}{b}$, where $a$ and $b$ are integers and $b \neq 0$. Examples include $\frac{1}{2}$, 3, and -4.5.

What is a Reflection in Math?

In geometry, a reflection is a transformation that flips a shape over a line, creating a mirror image. The line of reflection acts like a mirror.

What is a Reflection in Math Terms?

A reflection in math terms refers to the flipping of a figure across a line or axis so that the figure is mirrored.

What is a Relation in Math Terms?

A relation in math is a set of ordered pairs that show a relationship between two sets of values, often between inputs and outputs. A relation may or may not be a function.

What is a Relation Math Term?

A relation is any collection of ordered pairs of numbers, typically denoted as $(x, y)$, where $x$ is from the domain and $y$ is from the range.

What is a Representation in Math?

A representation in math is a way to display or describe mathematical ideas or concepts using numbers, symbols, graphs, diagrams, or models.

What is a Sample in Maths?

A sample in statistics is a subset of a population that is used to represent the entire population in data collection or analysis.

What is a Signed Number in Math?

A signed number is any number that includes a positive (+) or negative (-) sign. For example, -5 and +3 are signed numbers.

What is a Solution in Math?

A solution in math is the value or set of values that satisfy an equation or inequality. For example, in the equation $x + 2 = 5$, the solution is $x = 3$.

What is a Square Number in Maths?

A square number is a number that can be written as the product of an integer multiplied by itself. For example, 9 is a square number because $3 \times 3 = 9$.

What is a Strip Diagram in Math?

A strip diagram is a visual model used to represent relationships between numbers in addition, subtraction, multiplication, and division problems. It looks like a series of rectangles divided into parts.

What is a Subset Math?

A subset is a set where every element of the subset is also an element of another set. For example, the set {1, 2} is a subset of {1, 2, 3}.

What is a Successor in Maths?

A successor in math is the number that comes immediately after a given number. For example, the successor of 5 is 6.

What is a Triangular Number in Maths?

A triangular number is a number that can be arranged in the shape of an equilateral triangle. The $n$-th triangular number is the sum of the first $n$ natural numbers. For example, the first triangular number is 1, the second is 3, and the third is 6.

What is a Triangular Prism in Math?

A triangular prism is a 3D shape with two triangular bases and three rectangular sides.

What is a Two-Way Table in Maths?

A two-way table displays data that involves two categories. It shows the frequency of data points based on the combination of two variables.

What is a Unit Fraction in Math?

A unit fraction is a fraction where the numerator is 1, and the denominator is a positive integer, such as $\frac{1}{2}$ or $\frac{1}{3}$.

What is a Variable in Math?

A variable is a symbol, typically a letter, that represents an unknown value in an expression or equation. For example, $x$ in $x + 5 = 9$ is a variable.

What is a Visual Model in Math?

A visual model in math is a graphical or pictorial representation used to help understand a mathematical concept or solve a problem.

What is a Whole Number in Math?

A whole number is a number without fractions or decimals. It includes all non-negative integers: 0, 1, 2, 3, and so on.