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In geometry, an equilateral triangle is a triangle in which all three sides are equal. In traditional or Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°. They are regular polygons, and can therefore also be referred to as regular triangles. Wikipedia

Type any number into any field, the other field will be calculated automatically.

Equilateral Triangle:

Equilateral Triangle.
 Length = a Height (h): \small \bold{\color{blue} h \ = \ \frac{\sqrt[]{3}}{2} \ a} Circumference (C): C = 3a Area (A): \small \bold{\color{blue} A \ = \ \frac 12 \ ah \ = \ \frac{\sqrt[]{3}}{4} \ a^2}
Length (a): m ft
Height (h): m ft
Area (A): m2 ft2
Circumference (C): m ft