A cikin wannan ɗaba'ar, za mu yi la'akari da ma'anar da ainihin kaddarorin trapezoid isosceles.
Ka tuna cewa ana kiran trapezoid isosceles (ko isosceles) idan gefansa daidai suke, watau AB = CD.
Kadarori 1
Kusurwoyi a kowane tushe na trapezoid isosceles daidai suke.
- ∠DAB = ∠ADC = a
- ∠ABC = ∠DCB = b
Kadarori 2
Jimlar kishiyar kusurwoyi na trapezoid shine 180 °.
Ga hoton da ke sama: α + β = 180°.
Kadarori 3
Diagonals na trapezoid isosceles suna da tsayi iri ɗaya.
AC = BD = d
Kadarori 4
Tsayin isosceles trapezoid BEsaukar a kan tushe mafi tsayi AD, ya raba shi zuwa kashi biyu: na farko yana daidai da rabin adadin sansanonin, na biyu shine rabin bambancin su.
Kadarori 5
Bangaren layi MNhaɗa tsaka-tsaki na sansanonin trapezoid isosceles yana tsaye ga waɗannan sansanonin.
Layin da ke wucewa ta tsakiyar maƙallan tushe na trapezoid isosceles ana kiransa axis na daidaito.
Kadarori 6
Ana iya kewaya da'irar a kusa da kowane isosceles trapezoid.
Kadarori 7
Idan jimlar tushe na trapezoid isosceles daidai yake da ninki biyu na tsawon gefensa, to ana iya rubuta da'irar a ciki.
Radius na irin wannan da'irar daidai yake da rabin tsayin trapezoid, watau R = h/2.
lura: Sauran kaddarorin da suka shafi kowane nau'in trapezoid an ba su a cikin littafinmu -.