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19. Co-ordinate Geometry: Internal and External Division of Straight L
Home · Class 9 · Mathematics · Ref. Book · 19. Co-ordinate Geometry: Internal and External Division of Straight L
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Q11 of 23 Page 322

The mid-point of line segment joining two point s (ℓ, 2m), and (–ℓ + 2m, 2ℓ – 2m) is

Let the coordinates of that mid-point be (x, y) –

And, we know mid-point formula, i.e. the coordinates of mid-point of line joining (x1, y1) and (x2, y2) is




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The co-ordinates of vertices of triangle are (2, –4), (6, –2) and (–4, 2) respectively. Let us find the length of three medians of triangle.

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The co-ordinates of mid-point s of sides of a triangle are (4, 3), (–2, 7) and (0, 11). Let us calculate the co-ordinates of its vertices.

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The abscissa at the point P which divides the line segment joining two point s A(1, 5), B(–4, 7) internally in the ratio 2: 3 is

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The co-ordinates of end point s of a diameter of a circle are (7, 9) and (–1, –3). The co-ordinates of centre of circle is

Questions · 23
19. Co-ordinate Geometry: Internal and External Division of Straight L
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