Polygons on a Coordinate Plane

A polygon is a closed figure made up of straight line segments. Examples include triangles, rectangles, and pentagons.

A coordinate plane is a two-dimensional surface formed by the intersection of a horizontal line (x-axis) and a vertical line (y-axis).

To find the perimeter of a rectangle, add the lengths of all four sides or use the formula: P = 2(length + width).

The distance formula is: d = √((x2 - x1)² + (y2 - y1)²).

Coordinates are a pair of numbers (x, y) that define the position of a point on a coordinate plane.

The length of a side of a rectangle is the distance between two adjacent vertices.

To find the fourth vertex, use the properties of rectangles: opposite sides are equal and parallel.

Length is the longer side of the rectangle, while width is the shorter side.

The area of a rectangle is calculated by multiplying its length by its width: A = length × width.

Collinear points are points that lie on the same straight line.