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Solid Modeling
Extrusion
drag sketch in direction perpendicular to sketch plane
Revolution
rotate sketch about an axis/line lying on the sketch plane
3D solid shapes must
enclose a finite area
The resulting shape depends on the
axis about which the sketch is revolved to visualize extrusions
What axis can’t you revolve around?
x-axis because it’s perpendicular to sketch plane
What will happen in the axis is offset from the shape?
a cylindrical hole will result