Circles and Pi

Mathigon is part interactive textbook and part virtual personal tutor. This page focuses on polygons and polyhedra and is divided in six main sections : polygons, quadrilaterals, tessellations, polyhedra, nets and cross sections, platonic solids. [Source : Mathigon Website]

Mathigon is part interactive textbook and part virtual personal tutor. This page focuses on non-Euclidean geometry and is divided in six main sections : spherical geometry, map projections, hyperbolic geometry, metric spaces, topology, higher dimensions. [Source : Mathigon Website]

This online course allows students to review certain geometry concepts: geometric transformations, superimposable and similar figures, trigonometry, right triangles, solving any triangle, analytic geometry, conics, circles, and solids. The concepts are presented in the form of videos and short review exercises with immediate feedback. A final challenge completes the course.