Equilateral Triangle Calculator
What are the area, height and perimeter of an equilateral triangle? Enter the values below to calculate the result.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Side a (length) | Enter side a in length; use the same basis as the other measurements. |
Understanding your result
Read area (length^2), height (length), perimeter (length) in the units and model stated on this page. The formula area=sqrt(3)*a*a/4 · height=sqrt(3)*a/2 · perimeter=3*a defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What are the area, height and perimeter of an equilateral triangle?
What are the area, height and perimeter of an equilateral triangle? Enter the values below to calculate the result.
Common uses
- What are the area, height and perimeter of an equilateral triangle
How it works
area=sqrt(3)*a*a/4; height=sqrt(3)*a/2; perimeter=3*a
Worked example
Enter Side a: 2 length. Results: area: 1.7320508075688772 length^2; height: 1.7320508075688772 length; perimeter: 6 length.