Kulolu shicilelo, sizocubungula incazelo kanye nezakhiwo eziyisisekelo ze-trapezoid ye-isosceles.
Khumbula ukuthi i-trapezoid ibizwa ngokuthi amasosles (noma ama-isosceles) uma izinhlangothi zawo zilingana, isb AB = CD.
Impahla 1
Ama-engeli kunoma yiziphi izisekelo ze-trapezoid ye-isosceles ayalingana.
- ∠DAB = ∠ADC = a
- ∠ABC = ∠DCB = b
Impahla 2
Isamba sama-engeli aphambene we-trapezoid ngu 180 °.
Ngesithombe esingenhla: α + β = 180°.
Impahla 3
Ama-diagonal we-trapezoid ye-isosceles anobude obufanayo.
AC = BD = d
Impahla 4
Ukuphakama kwe-trapezoid ye-isosceles BEyehliswe phezu kwesisekelo sobude obukhulu AD, ihlukanise ibe izingxenye ezimbili: eyokuqala ilingana nengxenye yesamba sezisekelo, eyesibili iyingxenye yomehluko wazo.
Impahla 5
Ingxenye yomugqa MNukuxhuma amaphoyinti aphakathi kwezisekelo ze-trapezoid ye-isosceles ku-perpendicular kulezi zisekelo.
Umugqa odlula phakathi nendawo yezisekelo ze-isosceles trapezoid ubizwa ngokuthi yiwo i-eksisi yesimethri.
Impahla 6
Umbuthano ungazungezwa kunoma iyiphi i-isosceles trapezoid.
Impahla 7
Uma isamba sezisekelo ze-trapezoid ye-isosceles silingana nobude obuphindwe kabili kohlangothi lwayo, khona-ke umbuthano ungabhalwa kuwo.
I-radius yombuthano onjalo ilingana nengxenye yobude be-trapezoid, okungukuthi R = h/2.
Qaphela: ezinye izakhiwo ezisebenza kuzo zonke izinhlobo ze-trapezoid zinikezwe ekushicilelweni kwethu -.