Khatisong ena, re tla nahana ka tlhaloso le thepa ea mantlha ea isosceles trapezoid.
Hopola hore trapezoid e bitsoa bokamoso (kapa li-isosceles) haeba mahlakore a eona a lekana, ke hore AB = CD.
Thepa 1
Li-angles ho efe kapa efe ea metheo ea isosceles trapezoid lia lekana.
- ∠DAB = ∠ADC = a
- ∠ABC = ∠DCB = b
Thepa 2
Kakaretso ea likhutlo tse fapaneng tsa trapezoid ke 180 °.
Bakeng sa setšoantšo se ka holimo: α + β = 180°.
Thepa 3
Li-diagonal tsa isosceles trapezoid li na le bolelele bo lekanang.
AC = BD = d
Thepa 4
Bophahamo ba trapezoid ea isosceles BEe theotsoe motheong oa bolelele bo boholo AD, e arola likarolo tse peli: ea pele e lekana le halofo ea kakaretso ea metheo, ea bobeli ke halofo ea phapang ea bona.
Thepa 5
Karolo ea mola MNho hokahanya li-midpoints tsa metheo ea isosceles trapezoid ke perpendicular ho metheo ena.
Mohala o fetang bohareng ba metheo ea isosceles trapezoid o bitsoa eona selekane sa symmetry.
Thepa 6
Selika-likoe se ka pota-potiloe ho potoloha isosceles trapezoid efe kapa efe.
Thepa 7
Haeba kakaretso ea metheo ea isosceles trapezoid e lekana le habeli bolelele ba lehlakore la eona, joale selikalikoe se ka ngoloa ho sona.
Sebaka sa selikalikoe se joalo se lekana le halofo ea bolelele ba trapezoid, ke hore R = h/2.
Hlokomela: tse ling kaofela tsa thepa e sebetsang ho mefuta eohle ea trapezoids e fanoa khatisong ea rona -.