Geometry, it's the big G, as James Brown sang.

• The intersections of two circles (28 May 2026)
• Trigonometry in one picture (28 April 2026)
• Geometry of the regular tetrahedron (26 April 2026)
• The altitudes of a triangle meet (19 April 2026)
• Proof that the bisectors of the sides of a triangle meet (14 April 2026)
• Constructing a pentagon with ruler and compass (2 April 2026)