A wedge shape is to a diamond shape as a vertical bar is to which of the given figures?
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Look at what happens to the curved edge of the wedge when it becomes a diamond, it turns into a sharp point. Apply the same change to the flat right edge of the bar.
Step 1: Count edges and points instead of just looking at shape. The wedge has 3 sides: two straight sides that meet at a sharp point on the left, and one curved side on the right joining the ends of those two straight sides.
Step 2: Count edges and points on the diamond. The diamond has 4 straight sides and 4 sharp points, left, right, top and bottom. Compared to the wedge, one curved side has been split into two straight sides that meet at a brand new point on the right. Nothing about the left point changed. So the rule, stated in terms of edges, is: take the one non straight edge farthest from the existing point, and split it into two straight edges that meet at a new point.
Step 3: Apply this edge splitting rule to the bar. The bar has 4 straight edges: left, top, right and bottom, and none of its corners stick out as a sharp point, since all four corners are plain 90 degree corners. Splitting its right edge into two edges meeting at a new point gives a five sided figure: left edge unchanged, top and bottom edges shortened, and a new point sticking out on the right.
Step 4: Confirm against the answer choices. That five sided, arrow like figure is exactly option 3. Option 4 instead replaces the straight right edge with a curve, which adds curvature instead of removing it, the reverse of what the first pair actually shows. Options 1 and 2 leave the rectangle completely unchanged, so they cannot complete an analogy that clearly changes the shape.
Final Answer: Option 3, the pointed pentagon shape, correctly completes the analogy. \[ \boxed{\text{Option 3}} \]
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