Rule #2: Always draw contiguous closed profiles.
This sketch shows the geometry used on three extrusions. First the rectangle is extruded .125 of an inch, and then the .375 DIA circle is extruded 1 inch. Next the .094 DIA circle cuts a hole through the part.
Sharing sketches consolidates sketch geometry so it’s easier to edit. This also gives you the ability to see conflicts in your modifications all on a single sketch. If Inventor loses geometry during an update you only need to modifying one sketch.
Rule #3: Add finishing…
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This course makes algebra simple. It's based on skills used in Algebra the Game, and it shows you how to solve real life problems.