Faɗin alwatika daga maki uku

Yadda ake samun kimantawa

D = (xB − xA)(yC − yA) − (yB − yA)(xC − xA). Faɗi mai alama D/2 ne; marar alama |D|/2 ne. A waɗannan gatari, D tabbatacce na nufin akasin agogo, korau bin agogo, sifili kuma maki a layi ɗaya ko sun haɗu. Maki maimaitattu ko a layi ɗaya ingantattu ne da faɗi sifili. Rarrabawa na amfani da ainihin bambance-bambance da ninkawar ƙimar lambobin da aka karɓa, ba tare da sassaucin kusa da sifili ba.

Maki uku na lambobi na gaske a shimfiɗa kawai, a gatari na kusurwar dama da sikeli ɗaya. Ba ya lissafa faɗin ƙasa ta taswira, saman ƙwallo ko 3D, tsawon gefe, kusurwa, kewaye, cibiyar faɗi, zane, gwajin maki a ciki ko sauya raka'a. Ba ya tabbatar da awo, ƙiyasta rashin tabbas ko ba da tabbacin sakamakon safiyon ƙasa, na zahiri ko aminci. Ainihin alaƙar lambobin da aka karɓa ba hujja ba ce ga abubuwan da aka auna.

Duba misalin da aka cika

Misalin da muka zaɓa: A = (−2, 1), B = (3, −1), C = (1, 4). Bambance-bambancen gefuna su ne (5, −2) da (3, 3); D = 5×3 − (−2)×3 = 21. Faɗi biyun 10.5 raka'ar ma'auni² ne; jerin yana akasin agogo. Waɗannan lambobin misalin lissafi ne, ba ƙa'idoji ko hasashe ba.

Ƙimomin da aka karɓa

Maki A: ma'aunin x

-2

Maki A: ma'aunin y

1

Maki B: ma'aunin x

3

Maki B: ma'aunin y

-1

Maki C: ma'aunin x

1

Maki C: ma'aunin y

4

Shirya mataki na gaba

Yi amfani da kalkuletar gama-gari don lissafi dabam. Duba jerin maki, gatarin da ake nufi da raka'o'in ma'auni.