The coordinate plane

The origin of the plane

Axis definition

Coordinates of a point

Distance between two points

Introduction to Lines in Coordinate Geometry

Lines (in Coordinate Geometry)

Rays (in Coordinate Geometry)

Line Segments (in Coordinate Geometry)

Midpoint of a line segment (Midpoint Theorem)

Distance from a point to a line - introduction

When line is horizontal or vertical

Using two line equations

Using trigonometry

Using a formula

Slope (m) of a line

Intercept (b) of a line

Equation of a line in slope-intercept form y=mx+b

Equation of a line in point-slope form y=m(x-P_{x})+P_{y }

Vertical lines

Horizontal lines

Parallel lines

Perpendicular lines

Intersecting lines

Circumscribed rectangle (bounding box)

Area of a triangle (formula method)

Area of a triangle (box method)

Area of a polygon

Algorithm to find the area of a polygon

Area of a polygon (calculator)

Rectangle

Definition and properties, diagonals

Area and perimeter

Square

Trapezoid

Definition and properties, altitude, median

Parallelogram

Definition and properties, altitude, diagonals