
From Gogeometry Using Additional points congruent triangles Equilateral triangle Area of a triangle •ABCDEF is a regular hexagon with center O and side c => AB//DE, BC//EF et CD//FA •Let R=OA=OB=OC=OD=OE=OF •Define G such as PG⊥ AB. The same for H,I,J,K,L •AOF is an equilateral triangle with height h, such […]