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CBSE Class 10 Mathematics, Revision Notes, CHAPTER 07, COORDINATE GEOMETRY, , 1. Distance Formula, 2. Section Formula, 3. Area of a Triangle, , 1. Distance Formula: The length of a line segment joining A and B is the distance, between two points, 2. The distance of a point, , and, , is, , from the origin is, , . The distance of P from x-, , axis is y units and from y-axis is x-units., 3. Section Formula: The co-ordinates of the points p(x, y) which divides the line segment, joining the points, , and, , in the ratio, , are, , we can take ratio as, , 4. Mid-point Formula: The mid-points of the line segment joining the points, is, , 5. Area of a Triangle: The area of the triangle formed by the points, is the numeric value of the expressions, ., 6. If three points are collinear then we cannot draw a triangle, so the area will be zero i.e.