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Equilateral Triangle formulas
4 formulas for Equilateral Triangle, from the Mensuration (2D & 3D) section of the Quantix formula library. Tap 🧮 next to a formula to solve it for any variable with step-by-step working.
| Name | Formula | Note |
|---|---|---|
| Area | A = (√3/4) a² 🧮 Solve step by step | |
| Height | h = (√3/2) a 🧮 Solve step by step | |
| Perimeter | P = 3a 🧮 Solve step by step | |
| Circumradius / inradius | R = a/√3, r = a/(2√3) 🧮 Solve step by step |
What the letters mean
| a | side |
All sides equal, all angles 60°.
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Related: Mensuration (2D & 3D)
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