Integers, Coordinate Plane, and Geometry Review

Vocabulary practice flashcards generated from lecture notes covering whole numbers, integers, coordinate plane terms, and geometric figures.

Whole Numbers

The numbers $0, 1, 2, 3, 4, \dots$. They are not parts of numbers, so fractions and decimals are not included.

Integers

The set of whole numbers and their opposites, sometimes referred to as signed numbers (e.g., $-3, -2, -1, 0, 1, 2, 3, \dots$).

Positive Numbers

Numbers that are greater than zero, such as $0.5$, $2$, and $1000$.

Negative Numbers

Numbers that are less than zero, such as $-20$, $-500$, and $-65000$.

Coordinate Plane

A plane formed by the intersection of a horizontal line and a vertical line.

Quadrants

The four regions created by the intersection of the horizontal and vertical number lines in a coordinate plane.

X-Axis

The horizontal number line in a coordinate plane.

Y-Axis

The vertical number line in a coordinate plane.

Opposites

Two numbers that are the same distance from $0$ on a number line, but on opposite sides of $0$ (e.g., $-3$ and $3$).

Absolute Value

The distance between a number and $0$ on a number line, written as $|x|$.

Parallel Lines

Two lines in the same plane that do not intersect.

Right Angle

An angle whose measure is $90^\circ$.

Area

The amount of surface covered by a figure, measured in square units such as square feet ($\text{ft}^2$).

Square Units

The units in which area is measured, such as square feet ($\text{ft}^2$) and square meters ($\text{m}^2$).

Polygon

A closed figure in a plane that is made up of three or more line segments that intersect only at their endpoints.

Composite Figure

A figure made up of triangles, squares, rectangles, and other two-dimensional figures.

Triangle

A polygon with three sides.

Quadrilateral

A polygon with four sides.

Rectangle

A parallelogram with four right angles.

Square

A parallelogram with four sides that have the same length and four right angles.

Parallelogram

A quadrilateral with two pairs of parallel sides.

Trapezoid

A quadrilateral with exactly one pair of parallel sides.