AI Tools
Health
Math
Everyday Life
Finance
Physics
Chemistry
Statistics
Construction
Pets
Time & Date
Conversion Calculator
Sign InPages
Category
Follow Us On:
Pages
Category
Follow Us On:
Input any one value, and the calculator will determine the sides, area, perimeter, altitude, and semi-perimeter of the equilateral triangle.
Related
The Equilateral Triangle Calculator allows you to compute key properties of an equilateral triangle, including area, height, perimeter, and semiperimeter, quickly and accurately.
An equilateral triangle is a type of triangle where all three sides are equal, and all three interior angles measure 60°. This triangle is also called a regular triangle. Key features include:
You can calculate the area in two common ways:
Method 1: Using Base and Height
Area = 1/2 × Base × Height
Method 2: Using Side Length
If the side length is a, then:
Area = (√3 / 4) × a²
The height can be found using the formula:
Height = (Side × √3) / 2
Find the height, area, perimeter, and semiperimeter of an equilateral triangle with side length a = 4 cm.
Solution:
Side: a = 4 cm
Area formula: A = (√3 / 4) × a²
Substitute a = 4:
A = (√3 / 4) × 4² = (√3 / 4) × 16 = 4√3 ≈ 6.928 cm²
Height: h = (a × √3) / 2
h = (4 × √3) / 2 = 2√3 ≈ 3.464 cm
Perimeter: P = 3a = 3 × 4 = 12 cm
Semiperimeter: s = 3a / 2 = 12 / 2 = 6 cm
You can also use the Equilateral Triangle Calculator to instantly determine all these properties.
Follow these steps to compute measurements efficiently:
Input:
Output:
From Wikipedia: Equilateral Triangle
From Study.com: Definition and Properties of Equilateral Triangles
Related
Add this calculator to your site.
×Just copy a given code & paste it right now into your website HTML (source) for suitable page.
Preview:
Easter into Action, Save With Satisfaction
UPTO
50 %
OFF
Give Us Your Feedback
Share Result
Equilateral Triangle Calculator
Links
Home Conversion Calculator About Calculator Online Blog Hire Us Knowledge Base Sitemap Sitemap TwoEmail us at
Contact Us© Copyrights 2026 by Calculator-Online.net
