Quadrilaterals

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QED: definition

Definition of a pentagon

Formula and description of the perimeter of a kite.

How to determine the area of a triangle given the coordinates of the three vertices using a bounding rectangle

How to determine the area of a triangle given the coordinates of the three vertices using a formula

Definiton and properties of a trapezoid (coordinate geometry) including altitude and median

Area and perimeter of a square (coordinate geometry)

Definiton and properties of a square (coordinate geometry)

Definition of the slope of a line given the coordinates of two points on the line, includes slope as a ratio and an angle.

How to determine if lines are perpendicular in coordinate geometry

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