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I need to know the area of this triangle and I would like to have an explanation because I dont know how to do it I know the formula just not how to get the height

I need to know the area of this triangle and I would like to have an explanation because I dont know how to do it I know the formula just not how to get the hei class=

Respuesta :

  • (-2,1)
  • (4,3)
  • (-2,-5)

Area

[tex]\\ \tt\longmapsto \dfrac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)|[/tex]

[tex]\\ \tt\longmapsto \dfrac{1}{2}|(-2)(3+5)+(4)(-5-1)+(-2)(1-3)|[/tex]

[tex]\\ \tt\longmapsto \dfrac{1}{2}|-16-24+4|[/tex]

[tex]\\ \tt\longmapsto \dfrac{1}{2}|-36|[/tex]

[tex]\\ \tt\longmapsto 18units^2[/tex]

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