I need advice on trimming a block with a 60* slope. Pics included to help!
#11
Senior Member
Join Date: Apr 2010
Location: Lived in San Diego now retired in Eagar, AZ.
Posts: 887
make it larger by a half inch or so (see the math in the above posts) and then 'square up', which in this case means to trim to the size you want with the 60 deg angle... you must start out with more than you need or it will never work... just like the HST...we cut larger on purpose so there is something that allows us to trim up WITH the seam rather than the outside edge...
#12
Super Member
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Join Date: Nov 2007
Posts: 9,688
Jan--you nailed it--none of my rulers--even the new one--have the 60 line at the corner! That is why this is a struggle for me! I have about five square rulers or various sizes--it wouldn't have taken much to put one on! Sigh. I've made many HST with this trim method with perfect results... but at least now I know WHY I'm stuggling. Thanks you!
#15
Karla...a ruler isn't going to make it work with both the angles and side lengths you have given, finished or unfinished. It's just plain impossible. Save your money. The math doesn't work...just ask Pythagoras. See for yourself with this interactive triangle.
http://www.mathopenref.com/triangle306090.html
Or draw your 2.5 x 4.5 rectangle on graph paper, add the diagonal and use a protractor to measure the angles. None of them will be 60º...it's 90º, a bit more than 61º and a bit less than 29º. Those bits make a difference. Forget the angle and go with the side measurements so the HRT fits with the rest of the block. The instructions are just plain wrong.
http://www.mathopenref.com/triangle306090.html
Or draw your 2.5 x 4.5 rectangle on graph paper, add the diagonal and use a protractor to measure the angles. None of them will be 60º...it's 90º, a bit more than 61º and a bit less than 29º. Those bits make a difference. Forget the angle and go with the side measurements so the HRT fits with the rest of the block. The instructions are just plain wrong.
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