Mukati
Muchinyorwa chino, tichatarisa mafomula akasiyana aunogona kuverenga nawo kureba kwerectangular trapezoid.
Yeuka kuti imwe yemativi inotenderera kune zvigadziko zvayo, uye naizvozvo ihwowo hurefu hwemufananidzo.
Kutsvaga kureba kwerectangular trapezoid
Kuburikidza nehurefu hwemativi
Kuziva kureba kwezvigadziko zvese uye rutivi rwakakura rwerectangular trapezoid, unogona kuwana kureba kwayo (kana diki divi):
Iyi fomula inotevera kubva. Muchiitiko ichi, kureba h igumbo risingazivikanwe rekona yekona yekurudyi rine hypotenuse d, uye gumbo rinozivikanwa - kusiyana kwezvigadziko, kureva (ab).
Kuburikidza nemabhesi nemakona ari pedyo
Kana kureba kwemabhesi uye chero acute angles ari padyo navo akapihwa, ipapo kureba kwerectangular trapezoid inogona kuverengerwa uchishandisa formula:
Kuburikidza nedivi nekona yakatarisana
Kana kureba kwedivi rerutivi rwerectangular trapezoid uye kona iri padyo nayo (chero ipi) ichizivikanwa, zvinokwanisika kuwana hurefu hwechimiro nenzira iyi:
Cherechedza: Uchishandisa iyi fomula, unogona, pakati pezvimwe zvinhu, kuratidza kuti iro diki rutivi kureba kwetrapezoid:
Kuburikidza nediagonals uye kona iri pakati pavo
Kunze kwekuti kureba kwezvigadziko zve rectangular trapezoid, diagonals uye kona pakati pavo zvinozivikanwa, kureba kwechimiro kunogona kuverengwa sezvinotevera:
Kana pachinzvimbo chehuwandu hwemabhesi, kureba kweiyo midline kunozivikanwa, saka fomula inotora fomu:
m - mutsetse wepakati, wakaenzana nehafu yehuwandu hwezvigadziko, kurevam = (a+b)/2.
Kuburikidza nenzvimbo uye nzvimbo
Kana iwe uchiziva nzvimbo yerectangular trapezoid uye kureba kwezvigadziko zvayo (kana midline), unogona kuwana hurefu nenzira iyi:
