[tex]\\ \sf\longmapsto AB=\sqrt{(-5+1)^2+(3-6)^2}[/tex]
[tex]\\ \sf\longmapsto AB=\sqrt{(-4)^2+(-3)^2}=\sqrt{16+9}=\sqrt{25}=5[/tex]
And
[tex]\\ \sf\longmapsto BC=\sqrt{(1+5)^2+(-5-3)^2}=\sqrt{(6)^2+(-8)^2}=\sqrt{36+64}=\sqrt{100}=10[/tex]
Then
Area:-
[tex]\\ \sf\longmapsto AB(BC)[/tex]
[tex]\\ \sf\longmapsto 5(10)=50units^2[/tex]
