| 释义 |
noun ˈpɛntəɡ(ə)nˈpɛn(t)əˌɡɑn A plane figure with five straight sides and five angles. 五边形 Example sentencesExamples - They are marked by a pentagon with three overlapping triangles.
- This says that the most stable arrangement is a pentagon surrounded by five hexagons.
- In plan, the building is comprised of five concentric pentagons, known as rings.
- Analysts also use a variety of symbols, such as parallelograms, pentagons, and others, to depict different types of events and activities.
- Write the number 1 through 10 in the boxes below so each side of the pentagon has a sum of 14.
- Father entered the room, arms full of suitcases shaped in rectangles, pentagons, squares, and even spheres.
- Thus, you can readily obtain a curved pentagon, heptagon, and so on.
- You may know about a pentagon, a hexagon, or an octagon.
- The hexagons, pentagons, and triangles that make up the biomes all have their own unique specification due to the irregular nature of the site.
- Similarly, nine atoms can form a pentagon bonded to a hexagon, each ring sharing two atoms with the other ring.
- Of course, this statement has to be explained, since it is untrue if we understand distance in the usual way: the edges of these pentagons are visibly not straight and do not have the same length.
- There are 24 ways to do it - make 12 pentagons, so that the mirror images are on each side of the pentagon.
- Although it is impossible to inscribe a regular pentagon in a square, an equilateral pentagon can be inscribed in two ways.
- He calculates the side of a regular pentagon in terms of the radius of the circumscribed circle.
- Perfect crystal structures can contain pyramids, cubes, or hexagons, but not pentagons.
- For those who don't know, a buckyball is an extremely stable soccer-ball-shaped molecule made up of 20 hexagons and 12 pentagons.
- In the second case, if the convex polygon is a pentagon incorporating all five points, then any four of these points can be connected to form a quadrilateral.
- The balls are made with small pieces of wood 12 pentagons and 20 hexagons which fit together to form a sphere.
- They are formed from 60 atoms of carbon bonded together in a combination of pentagons and hexagons to form a ball, just like a soccer ball.
- When I looked at what she was doing, she was trying to work out (on the napkin) how to calculate the sum of the internal angles of a pentagon.
OriginLate 16th century: via Latin from Greek pentagōnon, neuter (used as a noun) of pentagōnos 'five-angled'. The Greek expertise in geometry means that many geometrical forms have Greek names. The five-sided pentagon is formed from penta ‘five’ and gonia ‘angle’, just as polygon (late 16th century) is formed from the word for ‘many’ plus -gon and diagonal (mid 16th century) with dia ‘through’. Penta is also found in words such as the mystic figures of the pentangle (Late Middle English), pentacle (late 16th century), and pentagram (mid 19th century), and in the pentathlon (early 17th century), once the original five events of leaping, running, discus-throwing, spear-throwing, and wrestling of ancient Greek and Roman games. Fifty is found in Pentecost (Old English) which came via ecclesiastical Latin from Greek pentēkostē (hēmera) ‘fiftieth (day)’. The Jewish festival of Shavuoth is held on the fiftieth day after the second day of Passover. The Christian festival is held on the seventh Sunday after Easter commemorating the descent of the Holy Spirit on the disciples as recorded in Acts 2.
proper nounˈpɛntəɡ(ə)nˈpɛn(t)əˌɡɑn the Pentagon1The pentagonal building serving as the headquarters of the US Department of Defense, near Washington DC. Part of the building was badly damaged in the terrorist attacks of 11 September 2001. 五角大楼（美国国防部总部，位于华盛顿特区附近） - 1.1 The US Department of Defense.
美国国防部 the Pentagon said that ten soldiers had been killed 美国国防部声称有19个士兵被杀。
nounˈpɛn(t)əˌɡɑnˈpen(t)əˌɡän A plane figure with five straight sides and five angles. 五边形 Example sentencesExamples - They are marked by a pentagon with three overlapping triangles.
- Perfect crystal structures can contain pyramids, cubes, or hexagons, but not pentagons.
- Analysts also use a variety of symbols, such as parallelograms, pentagons, and others, to depict different types of events and activities.
- Although it is impossible to inscribe a regular pentagon in a square, an equilateral pentagon can be inscribed in two ways.
- When I looked at what she was doing, she was trying to work out (on the napkin) how to calculate the sum of the internal angles of a pentagon.
- In the second case, if the convex polygon is a pentagon incorporating all five points, then any four of these points can be connected to form a quadrilateral.
- They are formed from 60 atoms of carbon bonded together in a combination of pentagons and hexagons to form a ball, just like a soccer ball.
- For those who don't know, a buckyball is an extremely stable soccer-ball-shaped molecule made up of 20 hexagons and 12 pentagons.
- This says that the most stable arrangement is a pentagon surrounded by five hexagons.
- There are 24 ways to do it - make 12 pentagons, so that the mirror images are on each side of the pentagon.
- The balls are made with small pieces of wood 12 pentagons and 20 hexagons which fit together to form a sphere.
- Father entered the room, arms full of suitcases shaped in rectangles, pentagons, squares, and even spheres.
- Write the number 1 through 10 in the boxes below so each side of the pentagon has a sum of 14.
- Similarly, nine atoms can form a pentagon bonded to a hexagon, each ring sharing two atoms with the other ring.
- Of course, this statement has to be explained, since it is untrue if we understand distance in the usual way: the edges of these pentagons are visibly not straight and do not have the same length.
- In plan, the building is comprised of five concentric pentagons, known as rings.
- The hexagons, pentagons, and triangles that make up the biomes all have their own unique specification due to the irregular nature of the site.
- He calculates the side of a regular pentagon in terms of the radius of the circumscribed circle.
- Thus, you can readily obtain a curved pentagon, heptagon, and so on.
- You may know about a pentagon, a hexagon, or an octagon.
OriginLate 16th century: via Latin from Greek pentagōnon, neuter (used as a noun) of pentagōnos ‘five-angled’. proper nounˈpen(t)əˌɡänˈpɛn(t)əˌɡɑn the Pentagon1The pentagonal building serving as the headquarters of the US Department of Defense, near Washington, DC. 五角大楼（美国国防部总部，位于华盛顿特区附近） - 1.1 The US Department of Defense.
美国国防部 the Pentagon said 19 of its soldiers had been killed 美国国防部声称有19个士兵被杀。
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