Freeze the Shape, Track the Style

Two figures can look completely different after one tiny change. But watch this... their shape may not have moved at all. The real clue could be the inside shading, or the line around the edge. Can you track only that clue?

First, separate geometry from appearance. Geometry means the outline, size, position and direction. Appearance means what fills the figure, and how its boundary line is drawn. Hold the geometry still in your mind. Then inspect the fill: empty, striped, dotted, grey, or solid black. Next, inspect the boundary. It might change from a thin solid line to a thick solid line, or from solid to dashed. Trace the edge with your eyes. Ignore the inside while you compare the line style. Here is the trap: a fill change does NOT make a new shape, and it does not show a turn. A triangle that becomes striped is still the same triangle, in the same position, unless its geometry also changes.

Let's work through an example. A key gives the order: empty, striped, then dotted. Three boxes show a square changing in a sequence. In box one, the square is empty with a thin solid boundary. In box two, the same square is striped with a thin solid boundary. Choose what belongs in box three from four answer figures. Compare one feature at a time. The square stays upright, centred, and the same size. So geometry is fixed. The fill changes from empty to striped. The boundary stays thin and solid. The key says dotted comes next, without inventing a rotation. The answer figures show: a dotted upright square, a striped tilted square, a dotted upright square with a dashed edge, and a black circle. The correct answer is the dotted upright square with the thin solid edge. Only the fill advances. Everything else stays unchanged.

So remember: freeze the geometry, then track fill and boundary separately. Shape, position and direction stay innocent unless you SEE them change. Keep your eyes disciplined, and those sneaky attribute questions become clear. You have got this!