Proposed Problem 27 Right Triangle, incircles and inradius.
Proposed Problem 26 Right Triangle, altitude, incircles and inradius.
MindMap of Academic Disciplines
Vicunas, Inca Gold of the Andes
MindMap of Euclid's Elements. A mindmap is an excellent learning tool for visual communication, organization, content sequencing, and navigation on Internet.
Eyeball Theorem: Animated Angle to Geometry Study.
Pentagons & Pentagrams. I found, exploring with dynamic geometry software, new facts about pentagons and pentagrams. Key concept: Menelaus Theorem.
Pentagons & Pentagrams - Puzzle: 96 triangles.
Quadrilaterals. Theorems and Problems
Mind Map of Geometry from the Land of the Incas
Platonic Solids. Interactive animation
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