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