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Cad Blocks dwg file. Download in free cad blocks and apply in your current and future projects. About The Free AutoCAD blocks Simply click on the Download link, next to the image preview, to download a zip file which contains the block. Most blocks are on layer 0, byblock or bylayer and insert at 0,0,0. A PURGE and AUDIT has been run on each DWG file. Please contact us if you do find a block with a problem in it.

Calculating a Slope Gradient Slope gradients are written as Y:X, where Y is a single unit in rise and X is the run.  Both numbers must use the same units.  For instance, if you travel 3 inches vertically and 3 feet (36 inches) horizontally, the slope would be 3:36 or 1:12.  This is read as a "one in twelve slope." Calculating the Slope Percentage Slope percentage is calculated in much the same way as the gradient.  Convert the rise and run to the same units and then divide the rise by the run.  Multiply this number by 100 and you have the percentage slope.  For instance, 3" rise divided by 36" run = .083 x 100 = an 8.3% slope. Distance Formula and Pythagorean Theorem The distance formula is derived from the Pythagorean theorem. To find the distance between two points (x1,y1) and (x2,y2), all that you need to do is use the coordinates of these ordered pairs and apply the formula pictured below. The distance formula is  ...