Geometry

Question Analysis:
This question asks students to select all shapes that are cylinders, including non-standard cylinders like elliptical ones.
The focus is on identifying shape properties rather than names alone.

Key Concept Explanation:
A cylinder must have:
Two parallel and congruent curved bases (usually circular or elliptical)
One curved side
No corners (vertices) or flat faces

Step-by-Step Solution:
A: ✔ Circular cylinder
B: ✘ Cone (has vertex)
C: ✔ Elliptical cylinder (still vali...