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Converse of the Pythagorean Theorem

If a^2 + b^2 = c^2, then the triangle is a right triangle, where a and b are the lengths of the legs and c is the length of the hypotenuse of the triangle.

coordinate plane

A plan formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.

cube root

the number that is multiplied by itself three times

Hypotenuse

in a right triangle, the side opposite the right angle

Irrational Numbers

any number that cannot be expressed as a fraction.

Legs

in a right triangle, the sides that include the right angle; in an isosceles triangle, the pair of congruent sides

ordered pair

A pair of numbers that can be used to locate a point on a coordinate plane.

origin

The centre point of a number line (ground floor of a hotel, freezing point on a thermometer)

perfect cube

the product that results when three numbers are multiplied together

Perfect Square

the number that forms when two same numbers are multiplied together

Pythagorean Theorem

in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs

quadrants

Four regions into which a coordinate plane is divided by the x-axis and the y-axis

Rational Number

Any number that can be expressed as a ratio of two integers. Example; 6 can be expressed as 6/1, and 0.5 as 1/2.

real numbers

Any Number

Repeating Decimal

A decimal in which one or more digits repeat infinitely. Example: 0.757575...

Square Root

when multiplying a number by itself to get a square number

Terminating Decimal

A decimal number that ends or terminates. Example: 6.75

Triangle Inequality Theorem

The sum of the lengths of any two sides of a triangle is greater than the length of the third side.

x-axis

The horizontal axis on a coordinate plane.

x-Coordinate

is the first number in an ordered pair and it represents the location relative to the x-axis.

y-axis

The vertical axis on a coordinate plane.

y-Coordinate

The vertical measure, which is the second number in an ordered pair.

Rational numbers

Numbers that include integers, wholes, and natural numbers.

repeating decimals

a decimal that repeats the same digit or group of digits forever

square root of a number

a number that when multiplied by itself is equal to the given number

x axis

The horizontal axis on a coordinate graph, for the varaible that controls the other (an axis ia a line on a graph)

y axis

has the dependent variable, the vertical line on a graph