COORDINATE GEOMETRY

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Across
  1. 1. formula of (m1x2+)
  2. 4. formula used to find (x1+x2/2)
  3. 6. the point of intersection of its median of a triangle.
  4. 7. m=y2-y1/x2-x1
  5. 8. name of formula to the area of a tringle A=
  6. 9. area of a collinear points
Down
  1. 2. the point (0,0)
  2. 3. the points which devides a line segment in to three equal parts
  3. 5. distance between two points (-4,2) and (8,7)
  4. 6. the points A, B, C are lying on a straight line