Math Open Reference
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Subject Index
Coordinate Geometry
Polygons
Circumscribed rectangle (bounding box)
Area of a triangle (using formula)
Area of a triangle (box method)
Centroid of a triangle
Incenter of a triangle
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
Definition and properties, diagonals
Area and Perimeter
Trapezoid
Definition and properties, altitude, median
Area and Perimeter
Parallelogram
Definition and properties, altitude, diagonals
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