Circle - mai da'ira ... - geometrical adadi

Samar da wata da'irar ne ban sha'awa daga ra'ayi na occult, sihiri da kuma zamanin da ma'anar sanya shi ta hanyar mutane. Duk kewaye da mu da karami da aka gyara - kwayoyin zarra da kwayoyin - ne madauwari a siffar. Da rana ne zagaye, zagaye watã, mu duniya ne ma zagaye. Kwayoyin na ruwa - da tushen duk wata rayuwa - kuma da madauwari siffar. Ko yanayi na halitta da rayuwa a cikin al'umma. Alal misali, za ka iya tuna game da tsuntsu na gida - tsuntsaye saƙa shi a cikin wannan tsari.

Wannan adadi a tunani na zamanin d al'adu

Circle - wata alama ce hadin kai. Shi ne yanzu a daban-daban al'adu a da yawa daga cikin mafi karami cikakken bayani. Ba mu ko da hašawa yawa muhimmancin da wannan tsari a matsayin kakanninmu.

An dade kasance mai da'ira - akwai ãyã daga wani m line wanda alama ce ta lokaci da kuma har abada. A cikin pre-Kirista zamanin shi ne wani tsoho rãnã dabaran mark. Duk da maki a wannan adadi, da m da'irar layi ba shi da farko kuma ba shi da matuƙa.

A cibiyar daga cikin da'irar shi ya samar da m juyawa na sararin samaniya da kuma lokacin da Masons. Circle - karshen duk guda, shi ke sa shi ya asiri na halitta qarya, bisa ga Masons. Form Agogon kira na sauri da ciwon wani nau'i ma suturta mutum ba tare da koma zuwa ga batu na asali.

Wannan adadi yana da wani zurfin sihiri da kuma sufi tsarin bai wa shi daga da yawa daga mutane daga daban-daban al'adu. Amma abin da mai da'ira a matsayin adadi a lissafi?

Mene ne karkara

Sau da yawa manufar da'irar gauraye da ra'ayi daga cikin da'irar. Ba abin mamaki ba, tun da sun kasance ga juna da alaƙa. Ko da sunayen masu irin wannan, wanda ya haddasa wani yawa na rikice a zukatan m dalibai. Don gano "wanda shi ne wanda", la'akari da wadannan tambayoyi a cikin mafi daki-daki.

By definition, a da'irar ne a kwana wanda aka rufe, da kuma kowane batu na wanda equidistant daga wani batu da ake kira cibiyar daga cikin da'irar.

Me kana bukatar ka sani kuma yadda za a iya amfani da shi ja layi

Don zana da'ira, zabi wani sabani batu isa, wanda za a iya bayyana a matsayin Yã (shi ke mafi yawan kafofin ake magana a tsakiyar cikin da'irar, ba za mu karkata daga gargajiya tsarin rubutu). A mataki na gaba shi ne in yi amfani da kamfas - kayayyakin aiki, don zane, wanda kunshi sassa biyu gyarawa zuwa kowane daga cikinsu ko dai da allura ko Stylus.

Wadannan sassa biyu suna juna ta wani hinjis da damar zabi wani sabani kewayo wasu iyaka da alaka da da tsawon mafi yawan wadannan sassa. Amfani da wannan na'urar a cikin sabani batu Yã an saita spearhead compasses da fensir riga circumscribed kwana da haifar shi ne na da'irar.

Abin da dabi'u halin da'irar

Idan ka gama amfani da wani m cibiyar daga cikin da'irar da wani sabani aya a kan kwana samu a sakamakon wani kamfas, mun samu cikin radius daga cikin da'irar. Duk da irin wannan segments, kira radii ne daidai. Idan muka haɗa da taimakon wani mike layin da line biyu da maki a cikin da'irar da kuma cibiyar, za mu sami da diamita.

Ga lissafi na da'irar ne ma halayyar ta tsawon. Don samun shi wajibi ne don sanin ko dai diamita ko da radius daga cikin da'irar da kuma amfani da dabara aka nuna a kasa.

A wannan dabara, C - karkara, r - da radius daga cikin da'irar, d - diamita da kuma lambar PI - m da darajar 3.14.

Ba zato ba tsammani, da akai PI aka lasafta a matsayin lokaci daga karkara.

Sai ya juya daga cewa ko da abin da da'irar diamita ne, da rabo daga circumferential tsawon kuma guda diamita, daidai game 3.14.

Mene ne babban bambanci daga karkara na da'irar

A gaskiya ma, cikin da'irar - wani line. Ba shi da wani adadi, shi ne rufaffiyar kwana layi ba tare da wata karshen ko farko. Kuma da sarari cewa an located ciki da shi - shi ne fanko. A sauki misali na circumferentially protrudes hoop ko daban, wani hula-hoop, wanda yara amfani a jiki da horo ko manya, domin ya haifar da wani siriri waistline.

Yanzu mun zo manufar abin da da'irar. Wannan shi ne da farko wani adadi da shi ne a wasu sa na da maki, da iyaka line. A wannan yanayin da da'irar karkara line Ayyukan Manzanni tattauna a sama. Sai dai itace cewa da da'irar - mai da'ira, a tsakiyar wanda ba komai, da kuma sa na da maki a sarari. Idan ka cire a kan hula-hoop da masana'anta, sa'an nan ba za mu iya ba karkatar da shi, domin zai daina da'irar - ta fanko aka maye da mai zane yanki na sarari.

Ci gaba kai tsaye zuwa ga ra'ayi na da'irar

Circle - geometrical adadi, wanda shi ne wani ɓangare na wani jirgin saman da aka ayyana ta cikin da'irar. Ga shi kuma an halin da irin sharuddan kamar radius da diamita, tattauna a sama a cikin definition daga cikin da'irar. Kuma suna lasafta su a cikin hanyar. A radius daga cikin da'irar da radius daga cikin da'irar ne m, a size. Haka kuma, da tsawon da diamita ma shi ne irin wannan a lokuta biyu.

Tun cikin da'irar da wani ɓangare na jirgin sama, halin da yankin domin shi. Lissafi da shi zai iya sake amfani da wannan radius da yawan PI. Da dabara ne kamar haka (duba. Adadi a kasa).

A wannan dabara, S - yankin, r - radius daga cikin da'irar. Pi - sake guda m daidaita 3.14.

Da dabara na da'ira, domin wanda lissafi ne kuma zai yiwu a yi amfani da wani diamita canji da kuma daukan siffar aka nuna a cikin wadannan adadi.

Daya kwata zo daga gaskiya cewa radius - yana da 1/2 diamita. Idan radius Squared, shi dai itace cewa da rabo da aka tuba zuwa rubuta:

r * r = 1/2 * d * 1/2 * d;

r * r = 1/4 * d * d.

Circle - wani adadi a cikin abin da mutum sassa, irin kansu za a iya gano. Yana kama da wani ɓangare na wani da'irar, wanda aka daure ta baka kashi da kuma ta biyu radii kõma daga cibiyar.

Da dabara wanda damar yin lissafi da wuri na kansu da aka nuna a cikin wadannan adadi.

Amfani da Figures a matsalolin da polygons

Har ila yau, cikin da'irar - wani lissafi da siffar, wanda sau da yawa ana amfani da wasu Figures. Alal misali, kamar alwatika, a trapezoid, a square ko wani rhombus. Sau da yawa akwai ayyuka inda ka bukatar ka sami yankin na rubũtacce da'irar, ko, a akasin haka, bayyana a kusa da wani takamaiman adadi.

A rubũtacce da'irar shi ne irin abin da lamba tare da duk bangarorin na polygon. A kowane gefe na polygon a wani circumferential batu na lamba ya kamata.

Ga wani irin definition polygon rubũtacce da'irar radius aka lasafta ta yin amfani daban-daban dokoki, wanda bayanin da aka bayyana a cikin shakka daga lissafi.

Daya zai iya buga a matsayin misali kaɗan daga gare su. Da dabara na da'irar rubũtacce a polygon za a iya lasafta kamar haka (hoton da ke ƙasa nuna wasu misalai).

A 'yan sauki misalai na rayuwa, domin ƙarfafa fahimtar bambanci tsakanin da'irar da kuma cikin da'irar

Kafin mu ne a manhole. Idan shi ne bude, da karfe baki na ƙyanƙyashe - da'irar. Idan aka rufe, murfin abubuwa a matsayin wani da'irar.

Circle kuma za a iya kira wani zobe - zinariya, da azurfa, ko kayan ado. Zobe, wanda ke rike da da gungu na keys - wannan da'irar.

Amma zagaye maganadisu a kan firiji, tasa ko pancakes, gasa kaka, shi ne wani da'irar.

Neck da kwalabe, ko gwangwani a cikin wani shirin - shi ne mai da'ira, amma murfin cewa rufe wuyansa, a daya kamar yadda saman ne a da'irar.

Irin wannan misalai suna da yawa, kuma ga assimilation daga cikin kayan da suke bukatar su jagoranci 'ya' ya fi kama da connection tsakanin ka'idar da yi.