Yadda yin lissafi da diamita daga cikin da'irar?

Domin starters, bari mu ga abin da da'irar da kuma yadda yake bambanta daga da'irar. Dauki alkalami ko fensir da kuma ja Paint a wani takarda akai da'irar. Fenti dukan tsakiyar sakamakon adadi a blue fensir. Red shaci nuna siffar iyaka - wani da'irar. Amma abinda ke ciki na blue ciki - kuma da akwai wani da'irar.

The girma daga cikin da'irar da kuma cikin da'irar diamita m. A cikin ja layi alama cikin da'irar, alama biyu da maki don haka abin da suka kasance madubi images of juna. Ware su line. A kashi dole wuce ta cikin aya a cibiyar daga cikin da'irar. Wannan kashi a haɗa m sassa na da'irar, kuma aka kira diamita lissafi.

Kashi cewa gudanar ba ta hanyar da cibiyar daga cikin da'irar, amma shi Yanã shigar da m iyakar da aka kira wani tsirkiya. Saboda haka, tsirkiya gudanar ta hanyar da cibiyar auna daga cikin da'irar, kuma da diamita ne.

Denoted diamita Latin harafi D. Samun diamita daga cikin da'irar zai iya zama da irin dabi'u kamar yankin, tsawon da radius daga cikin da'irar.

A nesa daga cibiyar nufi ga wani aya a kan karkara jinkiri, kira radius da kuma nuna ta harafi R. A ilmi na radius daga cikin da'irar diamita taimaka wajen lissafta mai sauki mataki:

D = 2 * R

Alal misali, cikin radius - 7 cm 7 cm ninka ta 2 da kuma samun darajar daidaita 14 cm A: D ne daidai da qayyadedden adadi na 14 cm ..

Wani lokacin shi wajibi ne domin sanin da diamita na da'irar tare da tsawon. Ga shi wajibi ne in yi amfani da musamman dabara da taimaka ƙayyade da karkara. Jadawalin 2 L = PI * R, inda 2 - shi ne akai darajar (m), da kuma PI = 3.14. Kuma tun da shi ne da aka sani cewa R = D * 2, sa'an nan da dabara za a iya wakilta wani a hanya

L = PI * D

D = L / PI

Wannan magana ta shafi da dabara da'irar diamita. Musanya da aka sani da darajar a warware matsaloli wani lissafi da daya ba a sani ba. Xaukar tsawon shi ne 7 m Sanadiyar .:

D = 7/3, 14

D = 21, 98

A: diamita na 21,98 mita.

Idan darajar da yankin da aka sani, shi ne kuma zai yiwu domin sanin diamita daga cikin da'irar. A dabara da ake amfani a wannan harka shi ne kamar haka:

D = 2 * (S / PI) * (1/2)

S - a cikin wannan harka da yankin na adadi. Alal misali, a cikin aiki da shi ne daidai 30 murabba'in mita. M. Mun samu:

D = 2 * (30/3, 14) * (1/2) D = 9 55414

Lokacin da sanya aiki a girma daidaita da girma (V) da ball, da wadannan dabara aka gano diamita: D = (6 V / PI) * 1/3.

Wani lokacin dole ka sami diamita daga da'irar rubũtacce a alwatika. A saboda wannan dalili, bisa ga dabara wakilta cikin da'irar radius find:

R = S / p (S - qaddara yankin na alwatika, kuma p - kewaye raba by 2).

A sakamakon haka ne ninki biyu, la'akari da cewa D = 2 * R.

Sau da yawa sami da'irar diamita da kuma da a cikin gida. Alal misali, lokacin da kayyade girman da zobe, wanda yake daidai da diamita. Don yin wannan, kunsa yatsan wani m owner of thread zobe. Mark maki na lamba daga gẽfe guda biyu. Auna da tsawon na line daga batu a nuna. A sakamakon darajar da aka yawaita da 3.14, wadannan da dabara domin kayyade diamita na sananne tsawon. Saboda haka, da sanarwa cewa, sanin lissafi da kuma aljabara a rayuwa shi ne ba su da amfani, Ba ko da yaushe dace gaskiya. Kuma shi ne tsanani dalilin da ya dauki mafi alhakin makaranta batutuwa.