3D CAD basics — identifying geometric primitives In solid modeling, which of the following are standard geometric primitives available to build models?

Introduction / Context:
Most CAD systems provide a library of primitive solids that serve as building blocks for more complex shapes. Knowing these primitives speeds up modeling and supports feature-based design and Boolean operations such as union, subtract, and intersect.

Given Data / Assumptions:

• Common primitives include box (rectangular prism), cylinder, sphere, cone, torus, and wedge.
• These primitives can be combined and edited to form intricate parts.

Concept / Approach:
“Primitive” means a basic, parameter-driven solid. Boxes are defined by length, width, and height; cylinders by radius/diameter and height; wedges by two parallel faces offset at an angle. By combining primitives through Boolean operations and transforming them, designers quickly generate complex geometry.

Step-by-Step Solution:

Verification / Alternative check:
User manuals for major CAD platforms (AutoCAD, SolidWorks, Fusion, Inventor) list these primitives explicitly under solid modeling commands or shape libraries.

Why Other Options Are Wrong:

• Only spheres and cones: much too restrictive; many more primitives exist.
• Individual primitives alone (box or cylinder or wedge) ignore the breadth of typical CAD libraries.

Common Pitfalls:

• Confusing mesh primitives (graphics) with solid modeling primitives (engineering); in parametric CAD, primitives are volumetric solids with editable parameters.

Final Answer:
all of the above