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- Distance Formula: The length of a line segment joining A and B is the distance between two points A(x1, y₁) and (x2, y2) is
- The distance of a point (x, y) from the origin is √(x² + y²). The distance of P from x-axis is y units and from y-axis is x-units.
- Section Formula: The co-ordinates of the points p(x, y) which divides the line segment joining the points A(x1, y₁) and B(x2, y2) in the ratio m₁ m₂ are
we can take ratio as k: 1, k =m1/m2 - Mid-point Formula: The mid-points of the line segment joining the points P(x1, y1) and Q(x2, y2) is
- Area of a Triangle: The area of the triangle formed by the points (x1, y₁), (x2, y2) and (x3, y3) is the numeric value of the expressions
- If three points are collinear then we cannot draw a triangle, so the area will be zero i.e. = 0