Analogy — Polygon sides relation (doubling): Rectangle : Octagon :: ____

Introduction / Context:
Rectangle has 4 sides; octagon has 8 sides (doubling). We must select the option where the second polygon has double the sides of the first.

Concept / Approach:
Triangle → 3 sides; hexagon → 6 sides. That mirrors 4 → 8.

Why Other Options Are Wrong:

• Pentagon : Heptagon (5 → 7) is +2, not ×2.
• Cone : Sphere — solids, not a side-count relation.
• Angle : Quadrilateral — not both polygons and no doubling.

Final Answer:
Triangle : Hexagon