We know that,
Y coordinates below x-axis have negative value whereas above x-axis they have positive value. So, B = (a, -a), C = (-a, -a) and D = (-a, a) The value of x1+y1+x2+y2+x3+y3 = a+(−a)+(−a)+(−a)+(−a)+a = −2a
The above figure is a square. The value of x1+y1+x2+y2+x3+y3 is
Find the centroid of the triangle with vertices A(x1,y1), B(x2,y2) and C(x3,y3).
ABCD is a parallelogram with vertices A (X1, Y1) , B(X2, Y2) and C (X3, Y3). Then the coordinates of the fourth vertex D in terms of the coordinates of A, B and C are