Answer:
see attached
Explanation:
A net of a square pyramid will have four triangle shapes representing the lateral faces, and one square shape representing the base. The vertices of the triangles that are opposite the base edge will meet at a single point.
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Figures 3 and 4 must be rejected because they have 3 and 5 triangles, respecively.
Figure 6 must be rejected because the figure cannot be folded to form a square pyramid. (The two left-side triangles will overlap.)