首页
登录
职称英语
Marjorie Rice was an unlikely candidate for the role of mathematical innovat
Marjorie Rice was an unlikely candidate for the role of mathematical innovat
游客
2023-11-11
50
管理
问题
Marjorie Rice was an unlikely candidate for the role of mathematical innovator. She had no formal education in mathematics and save a single course required for graduation from high school in 1939. Nonetheless, in 1975 she took up a problem that professional mathematicians had twice left for dead, and showed how much life was in still.
The roblem was tessellation, or a rectangle — and fitting it together with copies of itself so that a plane is covered without any gaps or overlap. A region this plane would look rather like jigsaw puzzle whose pieces are all identical. Rice worked primarily with polygons, which consist only of straight lines. More specifically, she worked with convex polygons, in which the line joining any tow points on the polygon lies entirely within the polygon itself or on one of its edges. (A five-pointed star, for example, does not qualify as a convex polygon.)
By the time Rice took up tiling, its basic properties had been established. Obviously, any square can tile the plane, as many kitchen floors have demonstrated. Equilateral triangles are also a fairly clear-cut case. There is one other regular polygon (a polygon whose angles, and sides, are equal) that can tile the plane: hexagon. This fact was established by the ancient Greeks but had long before been exploited by honeybees in building their honeycombs.
And what of irregular polygons? As it turns out, any triangle or quadrilateral, no matter how devoid of regularity, will tile the plane. On the other hand, no convex polygon with more than six sides can do so, and the three classes of convex polygon that can were uncovered by the end of the First World War. So the only real question left by the time Marjorie Rice began her work was which convex pentagons tile the plane. [br] In the third paragraph, the author mentions honeycombs because_____.
选项
A、they prove that only regular polygons can tile the plane
B、they are an example of hexagonal structures
C、Greek mathematicians studied them
D、Marjorie Rice raised bees
答案
B
解析
细节题。第三段第四句提到“There is one other regular polygon…hat can tile the plane:thehexagon”,接着作者引用了蜜蜂的例子,说明利用六边形原理建造的蜂巢非常坚固,以此来证明六边形适用于“tile the plane”。
转载请注明原文地址:https://tihaiku.com/zcyy/3176981.html
相关试题推荐
Thetwomaincandidatesarebothcloselyassociatedwith[br][originaltext]
[originaltext]Well-QualifiedCandidatesFind
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
Publicofficialsandcandidatesforpublicofficeroutinelyusepublicopin
随机试题
Welcometooursmallbusinessset-upguide,providingalltheinformationyo
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago
SimplifiedChineseorTraditionalChinese?1.有些人建议恢复使用繁体中文2.有些人则认为应继续使用简体中文3.我
Thetrain________ofthestationrightontime.A、pulledB、pulleddownC、pulled
Itiscustomaryforadultstoforgethowhardanddullandlongschoolis.T
以下网络安全防御技术中,()是一种较早使用、实用性很强的技术,它通过逻辑隔
低钾血症心电图最早的改变是()A.Q-T间期延长 B.T波降低、变平或倒
最早提出以“学术自由”和“教学和科研相结合”原则举办高等学校的人是()。A.
患者咳嗽,胸痛。发热,咯吐腥臭浊痰,甚则脓血相兼。其治疗原则是A.扶正为主 B
在企业销售物流的客户满意度评价指标中,客户的抱怨率是指()。 A.抱怨的客户
最新回复
(
0
)