Geometry

Question Analysis
This question connects real-world objects to geometric definitions.
The main focus is identifying a right circular cone in practical contexts.

Key Concept Explanation
Right circular cone requirements:
Circular base
Apex centered above base

Step-by-Step Solution
Eliminate A (tilted → oblique).
Eliminate C (frustum, not full cone).
Eliminate D (pyramids ≠ cones).
Select B (straight = right alignment + circular base).

Common Mistakes
Confusing oblique cones with right circular cones, as in the case of the tilted ice -...