Other Triangles
- 3, 4, 5 Triangle
- 30-60-90 Triangle
- 45-45-90 Triangle
- 60-60-60 Triangle
- Acute Triangle
- BCI Triangle
- Brocard Triangles
- Calabi's Triangle
- Central Triangle
- Chasles's Polar Triangle Theorem
- Circum-Medial Triangle
- Circum-Orthic Triangle
- Circumcevian Triangle
- Circumcircle Mid-Arc Triangle
- Circumnormal Triangle
- Circumtangential Triangle
- Comedian Triangles
- Cosymmedian Triangles
- Diagonal Triangle
- Dom
- Drafter Triangle
- Equilateral Triangle
- Euler-Gergonne-Soddy Triangle
- Euler Triangle
- Excircle-Enclosing Triangle
- Extangents Triangle
- Feuerbach Triangle
- First Brocard Cevian Triangle
- First Brocard Triangle
- First Morley Adjunct Triangle
- First Morley Triangle
- First Neuberg Triangle
- Fourth Brocard Triangle
- Fuhrmann Triangle
- Golden Gnomon
- Golden Triangle
- Half-Altitude Triangle
- Heptagonal Triangle
- Heronian Triangle
- Hexyl Triangle
- Hofstadter Triangle
- Homothetic Triangles
- Inner Inscribed Squares Triangle
- Inner Napoleon Triangle
- Inner Vecten Triangle
- Intangents Triangle
- Integer Triangle
- Isosceles Right Triangle
- Isosceles Triangle
- Johnson Triangle
- Johnson Triangle Circumcircle
- Kobon Triangle
- Lucas Central Triangle
- Lucas Tangents Triangle
- Malfatti Triangle
- Marion's Theorem
- Median Triangle
- Mid-Arc Triangle
- Mixtilinear Triangle
- Morgan's Theorem
- Oblique Triangle
- Obtuse Triangle
- Original Triangle
- Orthologic Triangles
- Outer Inscribed Squares Triangle
- Outer Napoleon Triangle
- Outer Vecten Triangle
- Paralogic Triangles
- Poristic Triangles
- Primitive Pythagorean Triple
- Primitive Right Triangle
- Rational Triangle
- Reference Triangle
- Reflection Triangle
- Right Triangle
- Scalene Triangle
- Second Brocard Cevian Triangle
- Second Brocard Triangle
- Second Morley Adjunct Triangle
- Second Morley Triangle
- Second Neuberg Triangle
- Self-Polar Triangle
- Similar Triangles
- Tangential Mid-Arc Triangle
- Third Brocard Triangle
- Third Morley Adjunct Triangle
- Third Morley Triangle
- Triangle
- Unary Cofactor Triangle
- Vertex Triangle
- Yff Central Triangle