Yaya aka kayyade kusurwar R na bututu mai murabba'in a cikin ma'aunin ƙasa?

The kusurwar R a cikin bututun murabba'i shine baka na wucin gadi a mahaɗin jiragen sama guda biyu, wanda gabaɗaya shine rabin diamita na layin tsakiya na kusurwar baka R. Darajar baka mai lankwasa R shine gabaɗaya 1.5 ~ 2.0 sau diamita bututu. An ƙayyade girman kusurwar R bisa ga kauri na bangon bututun murabba'in. An raba kusurwar R zuwa kusurwar R na ciki da kusurwar R na waje. R na ciki shine gabaɗaya 1.5 ~ 2 sau kauri bango. Hakanan ana iya samar da bututun ƙarfe na murabba'i tare da kusurwoyin R daban-daban bisa ga buƙatun mai amfani.
Misali, ga bututun karfe rectangular tare da baka madauwari R, A=1.0MM, diagonal=1.15MM, ta yaya aka san kusurwar R? Idan bututun ƙarfe ne mai murabba'i tare da baka, shin hanyar lissafi ɗaya ce? Madaidaicin kusurwa yana da tsayin A da faɗin B, diagonal na C, kuma radius na baka na kusurwa huɗu R daidai yake. Yi lissafin girman R ta wannan tsari: (C/2-R) ^ 2=(A/2-R) ^ 2+(B/2-R) ^ 2 C ^ 2/4-CR+R ^ 2 =A ^ 2/4-AR+R ^ 2+B ^ 2/4-BR+R ^ 2 4R ^ 2-4 (A+BC) R+(A ^ 2+B ^ 2-C ^ 2)=0 .
Ya kamata a jaddada a nan cewa kusurwar R na ƙananan bututun rectangular baya nufin baka, amma kusurwar tsakiya. Arc yana nufin wani yanki a kan kewaye, kuma kusurwar da aka haɗa ta layin tsakanin iyakar biyu na arc da cibiyar ita ce kusurwar tsakiya. Tunda kewayen da'irar shine 2 π R kuma madaidaicin kusurwar tsakiya shine 2 π, tsayin baka wanda yayi daidai da kusurwar tsakiya shine 2 π R/2 π=R. Don haka, ana samun tsayin baka wanda ya yi daidai da kowane kusurwar tsakiya a (radiyon radiyo) = aR. Hanyoyin aunawa da kayan aikin don kusurwar bututu R sun haɗa da ma'aunin R da majigi. Za a iya amfani da ma'aunin R don maki mai kauri, na'urar daukar hoto don maki masu kyau, da kuma CMM don manyan buƙatu.