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Ƙarar da faɗin farfajiyar akwati mai kusurwoyin dama
Mene ne ƙarar da jimillar faɗin dukkan fuskoki shida na akwatinka mai kusurwoyin dama?
Shigar da ma'aunai uku masu kyau da ke haɗuwa a kusurwoyin dama, a santimita, don ƙarar lissafin siffa da faɗin rufaffiyar farfajiya.
Ma'aunanka uku
Yi amfani da gefuna uku na akwati ɗaya masu haɗuwa a kusurwoyin dama, dukkansu a santimita kuma a iyaka ɗaya. Ana buƙatar dukkan ma'aunai uku. Shigar da gutsattsarin desimal, ba a/b ba.
Yadda ake samun kimantawa
Ƙara V = L×W×H. Jimillar faɗin farfajiya S = 2(L×W + L×H + W×H): ana ƙirga kowace fuska daga fuskoki shida masu siffar murabba'i mai tsawo sau ɗaya. Sakamakon biyu suna buƙatar ma'aunai uku masu inganci da suka fi sifili. Ana yin ninkawa da tarawa da ainihin gutsattsarin desimal na ƙimomin lambobin da aka karɓa kafin zagaye lamba a ƙarshe; ba a sake amfani da faɗin da aka riga aka zagaye a tsakiya ba.
V = L × W × H
S = 2 × (L × W + L × H + W × H)Lissafin siffar rufaffen akwati mai kusurwoyin dama da aka bayyana kawai. Ba buɗaɗɗen akwati ko kimanta kayan gini ba. Ba ya haɗa kaurin bango, ƙarar kayan harsashi mai sarari a ciki, lanƙwasawa, fikafikan nadewa, mahaɗa, zoba, ɓarna, ramuka ko yawan shafi. Babu sauya raka'a ko zane. Ba ya tabbatar da ma'auni, kimanta rashin tabbas, ko ba da garantin iya ɗauka, dacewar girma, ƙarfi, girkawa ko aminci. Dole ma'aunai su bayyana iyakar ciki ɗaya ko iyakar waje ɗaya; ba a hasashen wace iyaka ake nufi ba.
OpenStax: ƙara da faɗin farfajiyar siffa mai kusurwoyin dama ↗Duba misalin da aka cika
Misalin da muka zaɓa: L = 7 cm, W = 4 cm, H = 2.5 cm. V = 70 cm³; faɗin fuskoki uku su ne 28, 17.5 da 10 cm², don haka S = 2×55.5 = 111 cm². Waɗannan ma'aunai ne na misalin lissafi, ba ƙa'idar marufi ko shawarar kayan aiki ba.
Ƙimomin da aka karɓa
- Tsawo (cm)
- 7
- Faɗi (cm)
- 4
- Tudu (cm)
- 2.5
Shirya mataki na gaba
Yi amfani da kalkuleta ta yau da kullum don lissafi daban. Duba ma'aunanka, kusurwoyin dama da amfani da raka'ar santimita iri ɗaya.
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