Distance around, space inside, skin outside, and room within — four measures that are easy to confuse.
The answer key prints on a separate page.
These four questions sit on one paper because the reliable error is answering the wrong one. Perimeter is a length, added up around the edge; area counts the squares inside; surface area is area again, wrapped around a solid; volume counts the cubes that fill it. A child who multiplies for a perimeter or adds for a volume has not made an arithmetic mistake — they have reached for the wrong dimension, and only a paper that mixes all four makes that visible.
Composite area is the section that rewards method over formula. A figure that is not a single named shape is two or three that are, and the move is to cut it into rectangles and triangles, find each, and add — or to find the enclosing rectangle and subtract the missing piece. Surface area and volume of prisms then test whether that same shape-by-shape habit survives the step into three dimensions.
