Side length (a) Height (h) Definition. Example 2: If you are given area A and you want to calculate perimeter P then you need to make two steps to get the solution. An equilateral triangle is a triangle in which all three sides are equal, so internal angles are 60° each. This calculator provides the calculation of all parameters of the triangle if you enter one of its parameters eg. Start by cutting your fabric to the width of your triangles. For our project, we wanted 6″ triangles so we cut our fabric at 6″ by the width of the fabric. Simply enter the width of the quilting fabric in this box. Star 60 Friendly Hexagon block created by Kari Schell using EQ8 How to Cut Triangles Using Your Cutting Mat. Example 1: If you are given altitude h and you want to calculate side a, then you need to use formula which connects h and a.. Once you can decipher a quilt block's grids, you can make it larger or smaller with ease. www.play-crafts.com/blog/equilateral-triangle-quilt-calculator Number of patches. You don’t need any fancy rulers to cut triangles. area of the triangle T=125 Calculate right riangle by: side a; area S; height h For this tutorial I am going to show you how to sew 60-degree triangles together into pairs, then rows & then put the rows together. 3 1/2" triangles are shown here. Lots of great projects and it will help me tackle an equilateral triangle quilt I am about to make. Altitude of an equilateral triangle is the perpendicular drawn from the vertex of the triangle to the opposite side is calculated using Altitude=(sqrt(3)*Side)/2.To calculate Altitude of an equilateral triangle, you need Side (s).With our tool, you need to enter the respective value for Side and hit the calculate … Equilateral triangles have three equal angles and 180 / 3 = 60. Customers who bought this item also bought. Equilateral triangle - a 3 sided geometrical figure that consists of 3 sides of equal length forming three internal angles of 60 degrees each. Why Block Structure Matters . This free online estimator tool will automatically deduct two inches from the usable fabric area to take into account fabric variability and trimming of the selvedges. Equation form: h = a√3: 2: a = 2h Here is the link to the equilateral triangle calculator referenced in the video. See all reviews. Equilateral Triangle Calculator. Assuming your cutting mat has a 60º line, you can cut still cut triangles. This shopping feature will continue to load items when the Enter key is pressed. So find a ruler with one or more 60 degree lines marked on it. Read more. Report abuse. Enter the number of patches (same size, fabric, color) you wish to estimate fabric requirement for. The diagram at the right shows when to use each of these formulas. Page 1 of 1 Start over Page 1 of 1 . Here is the one patch quilt from the video. 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