📏 Geometric Shapes

Explore articles about geometric shapes. Click on any article to read the full content with examples and illustrations.

Three types of triangles: acute with all angles less than 90°, right with one 90° angle, obtuse with one angle greater than 90°, each clearly labeled

Right triangle with squares on each side demonstrating a² + b² = c², classic Pythagorean theorem visual proof

Two congruent right triangles with corresponding sides and angles highlighted, showing the four congruence criteria

Triangle with labeled sides, altitude, medians, and notable points (incenter, centroid, circumcenter) illustrated

Two similar triangles with proportional sides highlighted, showing similarity ratio k, with corresponding angles and sides matched by color