Find out what's the height, area, perimeter, circumcircle, and incircle radius of the regular triangle with this equilateral triangle calculator.

The formula for the area of an equilateral triangle comes out from the general formula of the area of the triangle which is equal to ½ × base × height. The derivation for the formula of an equilateral triangle …

Aug 3, 2023 · What is an equilateral triangle in geometry – its definition, properties, picture, and types along with formulas for area and perimeter

The formula for the area of an equilateral triangle can be obtained by substituting the altitude formula. [7] Another way to prove the area of an equilateral triangle is by using the trigonometric function.

P = 3a is the basic formula for calculating the perimeter of an equilateral triangle, where 'a' denotes one of the triangle's sides. The sum becomes a + a + a = 3a since all three sides of an equilateral triangle …

AB = BC = AC, where AB, BC and AC are the sides of the equilateral triangle. And. ∠A = ∠B = ∠C = 60°. Based on sides there are other two types of triangles: All three sides are equal. All three angles are …

Input one element of an equilateral triangle, and the calculator will find the five unknown elements. The calculator provides a step-by-step explanation on how to find missing elements.

Jul 22, 2025 · In this article, we’ll explore everything you need to know about the Area of an Equilateral Triangle, its formula, derivation, real-life applications, and how to master it with practice.

A triangle has three sides and three angles. The three angles always add to 180°. There are three special names given to triangles that tell how...

This article explains what an equilateral triangle is, the formulas used to calculate its dimensions, how to use a calculator effectively, example problems, real-world applications, and ends with a FAQ section.