| 单词 | pentagon |
| 释义 | pentagon (once / 34763 pages) n A pentagon is a five-sided polygon: it has one more side than a square. This is a word you're most likely to learn in math class when studying geometry: a pentagon is a polygon that has five sides. There are many words for shapes that indicate their specific number of sides, such as octagon: a polygon with eight sides. The root penta means "five," which is why a pentagram has five points. You may have heard of the Pentagon, which is the center of the U.S. military in Washington D.C. It has this name because the building has five sides. WORD FAMILYpentagon: pentagonal, pentagons USAGE EXAMPLESForm a pentagon shape with your shoulders and arms, like the shape of home plate in baseball. Golf Digest(Oct 21, 2016) The screens are tall and wide, arranged side by side in a pentagon. New York Times(Sep 12, 2016) It sits atop a pentagon with the words "We Will Never Forget" and is accompanied by plaques listing donors and describing what happened that day. Los Angeles Times(Sep 11, 2016) n a five-sided polygon Hyper polygon, polygonal shape a closed plane figure bounded by straight sides Pentagon (once / 1113 pages) n WORD FAMILY Pentagon: Pentagons USAGE EXAMPLESThe Pentagon statement noted that “multiple UN Security Council resolutions explicitly prohibit North Korea’s launches using ballistic missile technology.” The Guardian(Jan 01, 2017) Army and Pentagon officials did not immediately respond to requests for comments on the threat assessments. Reuters(Dec 30, 2016) Citing privacy restrictions, Pentagon officials redacted parts of each report, which were released in response to Freedom of Information Act requests. Seattle Times(Dec 29, 2016) 1n a government building with five sides that serves as the headquarters of the United States Department of Defense Exp government building a building that houses a branch of government 2n the United States military establishment Hyper bureaucracy, bureaucratism nonelective government officials |
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