Question

choose all the shapes that can have a circular cross - section when cut by a plane.

Explanation:

Step1: Analyze cone

A cone cut parallel to its base gives a circular cross - section.

Step2: Analyze triangular pyramid

A triangular pyramid cannot have a circular cross - section when cut by a plane.

Step3: Analyze cube

A cube cannot have a circular cross - section when cut by a plane.

Step4: Analyze sphere

Any plane cutting a sphere gives a circular cross - section.

Step5: Analyze cylinder

A cylinder cut parallel to its base gives a circular cross - section.

Answer:

Cone, Sphere, Cylinder