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Pentagon
02
五角形
a government building with five sides that serves as the headquarters of the United States Department of Defense
03
五角形
the United States military establishment
例
In the game, each player had to draw a perfect pentagon without the use of a ruler.
Each face of a dodecahedron is a regular pentagon, contributing to its symmetrical structure.
The faces of a dodecahedron can be inscribed with regular pentagons, creating a geometric relationship.
In her math homework, she had to calculate the perimeter of various shapes, including triangles, squares, and pentagons.
X-ray crystallography revealed the molecular framework contained multiple rings incorporating pentagons and intersecting heptagons.