Euclidean Geometry: Developing Polygon Areas
Topics in Euclidean Geometry: Developing Polygon Areas
Numbered in the order to learn them.
Euclidean Area Foundations: Rectangles and Triangles with Sides Parallel to Axes
Euclidean Foundations: Possible Motivation for Distance Metric, Using Tilted Square
Euclidean Foundations: General Triangles and Shoelace Formula (Signed Area)
Geometry Area Foundations: Finite Unions of Triangles
Euclidean Area Foundations: Tilted Rectangles Revisited