So find a ruler with one or more 60 degree lines marked on it. Here is the one patch quilt from the video. For our project, we wanted 6″ triangles so we cut our fabric at 6″ by the width of the fabric. 3 1/2" triangles are shown here. Star 60 Friendly Hexagon block created by Kari Schell using EQ8 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. 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 … Once you can decipher a quilt block's grids, you can make it larger or smaller with ease. 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. Enter the number of patches (same size, fabric, color) you wish to estimate fabric requirement for. www.play-crafts.com/blog/equilateral-triangle-quilt-calculator The concepts are the same for other size triangles cut from the Hex N More , Sidekick and Super Sidekick rulers. Number of patches. 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. Page 1 of 1 Start over Page 1 of 1 . 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. Equilateral Triangle Calculator. This calculator provides the calculation of all parameters of the triangle if you enter one of its parameters eg. Here is the link to the equilateral triangle calculator referenced in the video. Equation form: h = a√3: 2: a = 2h The diagram at the right shows when to use each of these formulas. Side length (a) Height (h) Definition. If you remember your geometry, the interior angles of all triangles add up to 180. Equilateral triangle - a 3 sided geometrical figure that consists of 3 sides of equal length forming three internal angles of 60 degrees each. Start by cutting your fabric to the width of your triangles. Enter side length or height of triangle. See all reviews. area of the triangle T=125 Calculate right riangle by: side a; area S; height h Simply enter the width of the quilting fabric in this box. How to Cut Triangles Using Your Cutting Mat. Read more. Customers who bought this item also bought. 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. Report abuse. 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