Math K-Plus

User Friendly Area Of An Equilateral Triangle Calculator

How Do I Find The Area Of An Equilateral Triangle Using Its Formula

Let's look at the geometric characteristics of an equilateral triangle. But first, please review the definition of Area Of Two-Dimensional Shapes, and Angle.
  • An equilateral triangle has two unique features.
  • The first unique feature - all three sides of the triangle are exactly the same length. In this example sides A are of equal length.
  • The second unique feature of an equilateral triangle are the interior angles are exactly 60°. The sum of the interior angles is 180°.
  • Special note, all sides of an Equilateral Triangle must be greater than zero.

Area Of An Equilateral Triangle Formula
Formula = (√ ÷ 4) × SideA2 =
Formula =  √ 3 × 0.25 × SideA2 =
Formula = 1.73205080 × 0.25 × SideA2 =
Formula = 0.4330127 × A2

Equilateral Triangle

Area Of Equilateral Triangle Calculator
Field Name User Input
Length Of A
You can enter up to 6 digits
Your Answer
You can enter up to 10 digits
Correct Answer

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