Question No.7 and Question No.6

Lesson#8
Question No.7
Q.7. The points A(-1,2), B(3,-1) and C(6,3) are consecutive vertices of a rhombus. Find the fourth vertex and show that the diagonals of the rhombus are perpendicular to each other.
Question No.6
Q.6. The three points A(7,-1), B(-2,2) and C(1,4) are consecutive vertices of a parallelogram. Find the fourth vertex.
Introduction to Analytical Geometry
Chapter No 4
Exercise No 4.3
Mathematics
part 2