Number of patches. www.play-crafts.com/blog/equilateral-triangle-quilt-calculator Read more. An equilateral triangle is a triangle in which all three sides are equal, so internal angles are 60° each. Enter the number of patches (same size, fabric, color) you wish to estimate fabric requirement for. 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 … 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. How to Cut Triangles Using Your Cutting Mat. Equilateral Triangle Calculator. So find a ruler with one or more 60 degree lines marked on it. The diagram at the right shows when to use each of these formulas. Side length (a) Height (h) Definition. Most quilting rulers have some angle lines marked. See all reviews. 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 area of the triangle T=125 Calculate right riangle by: side a; area S; height h Star 60 Friendly Hexagon block created by Kari Schell using EQ8 This shopping feature will continue to load items when the Enter key is pressed. 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.. Here is the one patch quilt from the video. The concepts are the same for other size triangles cut from the Hex N More , Sidekick and Super Sidekick rulers. 3 1/2" triangles are shown here. Once you can decipher a quilt block's grids, you can make it larger or smaller with ease. Here is the link to the equilateral triangle calculator referenced in the video. Lots of great projects and it will help me tackle an equilateral triangle quilt I am about to make. Page 1 of 1 Start over Page 1 of 1 . If you remember your geometry, the interior angles of all triangles add up to 180. For our project, we wanted 6″ triangles so we cut our fabric at 6″ by the width of the fabric. Assuming your cutting mat has a 60º line, you can cut still cut triangles. Enter side length or height of triangle. Why Block Structure Matters . Report abuse. Start by cutting your fabric to the width of your triangles. Equilateral triangles have three equal angles and 180 / 3 = 60. 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. Customers who bought this item also bought. This calculator provides the calculation of all parameters of the triangle if you enter one of its parameters eg. You don’t need any fancy rulers to cut triangles. Simply enter the width of the quilting fabric in this box. 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