1st-angle orthographic views of prisms, pyramids, cylinders and cones — true shapes of oblique cuts, a cone frustum, and prismatic/pyramidal holes revealed by sectioning.
This square prism is cut by a plane that slopes from the top-left corner down to a point on the right edge. Drag the slider to change how much the cut drops, and see how the TRUE SHAPE of the cut surface changes — even though the front-view outline barely changes.
Each exercise below prints as a full-scale A3 sheet — the same format used in EGD practical assessments. The reference thumbnail shows the completed drawing; redraw it full-size on paper using correct line types and true measurements. Use your printer's "Actual Size" setting (not "Fit to Page").