Geometry

Question Analysis  
This question assesses similarity of rectangular pyramids by comparing ratios of length, width, and height.
The main focus is ensuring all three dimensions scale uniformly.  

Key Concept Explanation  
For pyramids to be similar, the ratios of their corresponding linear dimensions (length, width, height) must all be equal.  

Step-by-Step Solution  
Length ratio:  
Width ratio:  
Height ratio:  
All ratios are equal (scale factor ) → Similar  
Answer: A  

Common Mistakes  
Forgetting to check all three dimensions (e.g., only verifying length and width).  
Miscalculating ratios (e.g.,