Unit 2SectionsMEDIUM

Section of a Sphere by an Inclined Plane

A sphere of 70mm diameter rests on HP. It is cut by a section plane inclined at 45° to HP and perpendicular to VP, passing through the center. Draw the sectional front view and true shape of section.

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Solution Diagram

Solution diagram for Section of a Sphere by an Inclined Plane
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Step-by-Step Construction

  1. 1

    Draw the sphere in front and top views

  2. 2

    Show the cutting plane in front view at 45° through center

  3. 3

    The section of a sphere is always a circle

  4. 4

    Calculate the diameter of the sectional circle

  5. 5

    Draw the sectional front view showing the cut surface

  6. 6

    The true shape is a circle with calculated diameter

Pro Tips

  • Always verify your measurements with a scale before finalizing the drawing
  • Use construction lines lightly and darken the final solution
  • Label all important points and reference lines clearly