If you were too busy being fed up with the bewildering nonsense, here’s some genuinely useful bits you might have missed
Pi=3.14, just remember 3 is a close short measure
Cross section of a round rod (area) is:
Pi x Radius x Radius (x length for volume)
So a 1” rod= .5 x .5 x 3.14= 0.785, note a 1” round rod can be hammered into a 3/4” square, a 1-1/8” round comes out to .9935”…handy to know off hand
Circumference of a circle is the whole Diameter x Pi, so 1” rod is 3.14” around, wondering how much kaowool for a round furnace, there you go
Steel weighs about 1/4lb/cubic inch, so a 1” round, 12” long weighs:
About 3/4” x 12”=9 cubic inches or about 2-1/4lbs
Pythagorean Theorem (a right, 90deg triangle): (A x A)+(B x B)= (C x C)
If the Two legs of the square/right corner (A and B ) were 2” and 3”, then (2x2=4)+(3x3=9), so 4 + 9=13, put 13 into a calculator and press the square root button, C = 3.60555” (near 3-5/8”)
C is also the diagonal of a square or rectangle;
If you’re trying to square the corners of a square or rectangle, the diagonals are equal, make it so and voila, don’t even need to bother with calculating
