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# SAT Prep

### SAT Math Definitions

What’s the difference between rational and irrational numbers? Rational numbers are numbers that can be expressed as a ratio of two integers. They can be in fraction, decimal or whole number form. Irrational numbers are numbers that cannot be expressed as a ratio of two integers.
What are vertical angles? When two lines intersect, four angles are formed. Each opposite pair are called vertical angles and are always congruent.
When do you switch sign direction when solving an inequality? When multiplying or dividing by a negative number.
How do you compute the sum of the number of degrees in the interior of any polygon? Take the number of sides minus two times one hundred and eighty degrees.
What is the relationship between the slopes of parallel lines? They are the same.
How are the slopes of perpendicular lines related? They are opposite reciprocals of one another.
What is the domain and range of a function? The domain includes all of the x values of the function and the range includes all of the y values of the function.
What is an integer? An integer is a number that can be written without a fractional component.
What is a prime number? A prime number can be divided evenly only by one and itself, and it must be a whole number greater than one.
What is a remainder? When an integer is divided by another, the remainder is the integer amount that is left over.
What are even integers? Even integers are numbers that can be divided by two without a remainder.
What are odd integers? Odd integers cannot be divided by two without a remainder.
What is a multiple? A multiple of a number is the result of multiplying that number by any integer.
What is a factor? A factor of a number is any integer that can divide that number without a remainder.
What is arithmetic mean? The arithmetic mean is the average of a group of numbers. It is the sum of the numbers divided by the number of numbers.
What does median mean? The median of a group of numbers is the number in the middle of the group after the group has been numerically sorted.
What does mode mean? The mode of a group of numbers is the number or numbers which appear most often (there can be more than one mode for a given group).
You are often asked on the SAT to solve for some variable “in terms of” another variable or variables. What does that mean? It means, if you are asked to solve for a in terms of b and c, then simply solve for a with all other variables and numbers on the other side of the equation.
What does less or fewer mean? When you see “less” or “fewer”, you should think subtraction.
What are real numbers? Real numbers are all the numbers on the number line.
What is a positive number? Positive numbers are numbers greater than zero.
What are negative numbers? Negative numbers are any numbers less than zero.
What number is neither positive or negative? Zero
What is a numerator? A numerator is the top number of a fraction.
What is a denominator? A denominator is the bottom number of a fraction.
What does quotient mean? A quotient is the result of division.
What does consecutive mean? Consecutive means following one another in uninterrupted succession.
What does distinct mean? Different or unique
What does absolute value mean? It means the distance from zero on a number line.
What is probability? Probability is the measure of the likeliness that an event will occur. Probability is expressed as a number between zero and one.
Created by: apb159
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