Category
page 1Types of triangles
right triangle
triangle in which one angle is a 90-degree angle
equilateral triangle
geometric shape with three sides of equal length
isosceles triangle
triangle with two sides congruent and two angles equal
Sierpiński triangle
fractal composed of triangles
Reuleaux triangle
Reuleaux polygon with three sides
Kepler triangle
A right triangle whose edge lengths form a geometric progression
golden triangle
isosceles triangle in which the duplicated side is in the golden ratio to the distinct side
spherical triangle
region bounded by arcs of three great circles
Heronian triangle
triangle that has side lengths and area that are all integers
hyperbolic triangle
triangle in the hyperbolic plane, possibly having ideal vertices
scalene triangle
triangle with all sides/angles unequal
acute or obtuse triangle
triangle without a right angle
special right triangle
right triangle with an additional feature beyond the right angle making calculations on the triangle even easier
integer triangle
triangle with integer side lengths
ideal triangle
hyperbolic triangle such that all three of its vertices are ideal points
circular triangle
triangle with circular arc edges
Calabi triangle
triangle having three different placements for the largest square