Answer 1

Let the vertices of a triangle be A(2, −4), B(−3, −7) and C(7, 2) 

Centroid of a triangle (G) = `((x_1 + x_2 + x_3)/3, (y_1 + y_2 + y_3)/3)`

= `((2 - 3 + 7)/3, (-4 - 7 + 2)/3)`

= `(6/3, (-9)/3)`

= (2, −3)

Centroid is (2, −3)