Question

if the coordinates of midpoints of sides of a triangle are (- 1,6) , (-3,-9) and (5,-8), the coordinates of centroid of triangle are​

Answer 1

Step-by-step explanation:

X1 = -1, X2 = -3, X3 = 5

Y1 = 6, Y2 = -9, Y3 = -8

Triangle = 1/2 [ -1(-9+8) + (-3)(-8-6) + 5(6+3) ]

= 1/2 [ -1×1 -3×-2 + 45 ]

= 1/2 [ -1 -6 + 45 ]

= 1/2 [ -7 + 45 ]

= 1/2 × -52

= -26