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Tsarin lissafi

Kalkuleta na Da'ira

Yankin, kewaye, da diamita na da'ira daga radius ɗinsa, tare da dabarun da aka nuna kuma aka yi aiki da su.

Ƙara zuwa wurin aiki

Ƙimomin shigarwa

Shigar da radius a cikin kowace naúra — mita, santimita, inci — kuma sakamakon zai dawo a cikin wannan naúrar (raka'a murabba'i don yanki). Sakamako yana sabuntawa yayin da kake rubutu. Duk lissafin suna gudana a cikin gida a cikin burauzarka.

Yanki

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Da'ira: —Diamita: —

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Ƙa’ida

Yanki = π × radius². Da'ira = 2 × π × radius. Diamita = 2 × radius. Ana amfani da π a cikakken daidaito kuma ana zagaye sakamakon zuwa digiri biyu don nunawa.

Misalin aiki

Radius 5: yanki = π × 5² = π × 25 = 78.54. Da'ira = 2 × π × 5 = 31.42. Diamita = 10. Idan radius ɗin ya kasance 5 cm, yankin shine 78.54 cm² kuma da'irar shine 31.42 cm.

Amfani da iyakoki

Wannan da'ira ce mai kyau: radius ɗaya, tsakiya ɗaya. Ellipses, baka, sassa, da zobba suna buƙatar dabarun kansu kuma ba a rufe su a nan ba. Shafin baya canza raka'a - radius a inci yana ba da yanki a inci murabba'i; juya farko idan kuna buƙatar wani naúrar.

Sigar tsari: 026488602e53 · An duba misali:

FAQ

Radius ko diamita - wanne zan shigar?

Radius: nisan daga tsakiya zuwa gefen. Idan kawai ka san diamita (gefe zuwa gefe ta tsakiyar), da farko ka raba shi rabi - ko kuma ka karanta guntun diamita da ke sama a baya.

Me yasa yanki yake cikin murabba'i?

Domin yanki ya rufe saman. Radius na 5 cm yana ba da 78.54 cm², ba 78.54 cm ba. Haɗa biyun shine kuskuren da'ira da aka fi sani.

Wane darajar pi ake amfani da shi?

Cikakken pi mai daidaito biyu (3.141592653589793…), ba 3.14 ba. Bambancin yana da mahimmanci ne kawai bayan adadi na biyu, amma babu wani dalili na yin zagaye da wuri.

Ta yaya yanki ke girma da radius?

Da murabba'i: ninka radius ɗin sau huɗu yana ninka yankin. Da'irar radius-10 tana da yanki 314.16, daidai sau huɗu na yankin radius-5 na 78.54.

Zan iya amfani da wannan don yin wani abu a cikin sphere?

A'a. Yankin saman wani yanki shine 4πr² kuma girmansa shine (4/3)πr³ — dabaru daban-daban don abu na 3D.

Me zai faru idan na san da'irar maimakon haka?

Raba shi da 2π don samun radius ɗin, sannan shigar da shi a nan. Don zagayen 31.42, radius ɗin shine 31.42 ÷ 6.2832 = 5.

Kayan aiki masu alaƙa

Sakamako kimantawa ne kawai kuma ba ya nufin shawarar ƙwararru.