221.In what ratio does the like x - y - 2 = 0 divides the line segment joining (3, -1) and (8, 9) ?
Let the given points are A(3, -1) and B(8, 9). Let the line x - y - 2 = 0 divides the line segment AB in the ratio K : 1 at point P. Then the co-ordinates of P are given as
Here, we have x1 = 3, y = -1 x2 = 8, y2 = 9 and m1 = k, m2 = 1. So, co-ordinates of P are
But P lies on x - y - 2 = 0 ...(i) Substituting the values of x (abscissa) and y (ordinate) in (i), we get
Hence, the required ratio is 2 : 3.
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222.Find the ratio in which the point (x, -1) divides the line segment joining the points (-3, 5) and (2, -5). Also find the value of x
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223.Find the ratio in which the point (2, y) divides the line segment joining the points A(-2, 2) and B (3, 7). Also find the value of y.
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224.In what ratio does the point P(2, -5) divide the line segment joining A(-3, 5) and B (4, -9)?
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225.The mid-points of the sides of a triangle are (3, 4), (4, 6) and (5, 7). Find the coordinates of the vertices of the triangle.
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226.Determine the ratio in which the line 3x + 4y - 9 = 0 divides the line segment joining the points (1, 3) and (2, 7)
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227.A line segment joining the points P(3, 3) and Q(6, - 6) is trisected at the points A and B such that A is nearer to P. If A also lies on the line given by 2x + y + k = 0, find the value of k.
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228.Find the area of the quadrilateral w hose vertices are A(0, 0), B(6, 0), C(4, 3) and D(0, 3).
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229.Find the area of the quadrilateral whose vertices, taken in order are (-4, -2), (-3, -5), (3, -2) and (2, 3).
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230.Find the value of ‘K’ if the points (K, 3), (6, -2) and (-3, 4) are collinear.