P
Perry
how do you set your floors out? chalk lines 1 or more? or by eye? or how ?
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Thanks Heffs, I knew it referred to a 3,4,5 triangle and pythagoras but didn't occur to me that it was used in the tiling world as such. I generally use a very large square.3 - 4 - 5 refers to Pythagoras's theorem: if a triangle is, say , 3 ft down one side, 4 ft side 2 and 5 ft down the 3rd, then the angle where the 3ft and 4 ft sides meet is always exactly 90 degrees. By setting up a triangle along a wall with these measurements (or to scale), you will get a line which comes off the wall at 90 degrees.
Never thought I'd give advice on a tiling forum!
Regards
Heffs
Ah! geometry! Takes me back to school in the early 70s.Another way of getting a 90 degree angle without using the 3.4.5 triangle method is to use the bisecting arc method by using a large compass or by making one from a short guage rod/flat stick. You can do this drawing your first line eg...centre-line and mark the point at which you are requiriing the angle.......strike a mark on the centre-line then put the compass point on that mark and scribe a large arc sweeping eg...half a semi- circle through the line. Repeat the process on the other side of the required point and where the two arcs intersects gives you an exact 90 degree angle. Sounds complicated but it is really easy to do witout the need of tape measures etc.