Geometry

Question Analysis:
This question involves determining whether a trapezoidal-based 3D figure is still a prism.
The main focus is testing if students understand that irregular polygons can be prism bases too.

Key Concept Explanation:
A prism can have any polygon as its base — including irregular polygons like trapezoids — as long as:
The two bases are identical and parallel
The sides are parallelograms (often rectangles)

Step-by-Step Solution:
The bases are trapezoids
There are four rectangles connecting the corresponding sides
→ This is a trapezoidal prism

Common Mistakes:
Believing only regular poly...