ghostrider

Quilt University offers a class called Math for Quilters that is one of their most popular classes. It's taught by Dena Crain who is an excellent teacher - I've had her for other classes.

The Math class is next offered starting April 27th and covers all sorts of things that are frequently asked here on the board...planning a cutting layout, on point quilts, drafting blocks in different sizes, figuring yardage requirements, calculating the cost of a quilt, setting a price for it.

Info on this and other QU classes at http://www.quiltuniversity.com/catalog.htm

CarrieC

GOODNESS this is SO MUCH EASIER doing it this way!

I draft out the darn thing on graph paper and measure with a ruler.

I can't wait to go home and try this and use it!

Thank you all for the lesson(s).

ncredbird

The 1.414 works with a SQUARE which is also a rectangle.
The A squared + B squared theory works with any right triangle (or diameter of a rectangle) meaning that the angle of intersection of the sides has to be 90 degrees. Ann in TN

Calico Grammy

This is exactly the reason I'm not a math major!!!!LOL

catmcclure

Quick math is size of block multiplied by 1.5 (actual measurement is 1.414 or something, but 1.5 will get you almost the exact number.

KathyJ

I recently learned this trick from a longarmer. I'm going to demo it at our next guild meeting. It is way too simple & easy so at first I wondered if it could be right. But. . .it is! Have used on several different size blocks. Much easier than math.

KathyJ

Sorry - the trick I learned was using the diagonal line on the cutting mat & trimming down after triangle was sewn to the diagonal of the square.

Nantie

I have a book called "All in one quilters reference tool" written by Harriet Hargrave, Sharyn Craig, Ales Anderson, and Liz Aneloski. i use this reference all of the time for everything..it has easy to follow charts, tables, and illustrations for yardage requirements, cutting instructions, setting secrets,choosing supplies, piecing techniques, number conversions and the list goes on. I highly recommend it as a quick reference for just about everyone. It is put out by C&T publishing for $16.95..that is the price on mine which admittedly is a few years old. It does have a table for diagonal measurements for squares amd lists them for sq. from 1.5 inches -12.5. If you want to pm me and let me know the sq. size you are interested in i would be glad to look it up for you.

luana

Try this

http://www.mathopenref.com/squarediagonals.html

Needle Up

I did a search on Bing and found a complete list of sizes for putting it on-point.

http:/www.quiltville.com