Spatial Visualization
Spatial Visualization asks you to mentally assemble, fold, turn, or reflect shapes without moving them physically. Level C items may show pieces that combine into one figure, a folded sheet with a cut or mark, or a shape that must be rotated or mirrored to match an option.
Work on one feature at a time
For combining pieces, match long edges to long edges and right angles to right angles. Two identical right isosceles triangles joined along their hypotenuses form a square; joined along a leg they form a larger triangle. For folding, track which edge is the fold: a cut through a folded edge appears twice, mirrored, when unfolded.
Worked example
A square sheet is folded in half vertically, and a small triangle is cut from the top corner of the folded edge. Unfolded, the cut appears at the top of the vertical midline as two mirror-image triangles, one on each side of the fold. A choice showing one triangle only, or two triangles on the outer corners, does not match the fold.
Traps
- Rotating a piece when the task allows only sliding.
- Forgetting that a fold doubles every cut on the fold line.
- Matching shapes by outline but ignoring which side is shaded.
- Losing track of left and right after a mental turn.