Find the coordinates of the point which divides the join of (–

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 Multiple Choice QuestionsShort Answer Type

121.

Find the point on the x-axis which is equidistant from (2, –5) and (–2, 9)

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122.

Find the values of y for which the distance between the points P(2, – 3) and Q(10, y) is 10 units.

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123.

If Q(0, 1) is equidistant from P(5, –3) and R(x, 6), find the values of x. Also find the distances QR and PR.

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124. Find a relation between x and y such that the point (x, y) is equidistant from the point (3, 6) and (-3, 4).
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125.

Find the coordinates of the point which divides the join of (–1, 7) and (4, –3) in the ratio 2 : 3.


Let the given points be A(-1, 7) and B(4, -3)
Here, we have
x1 = -1, y1 = 7
x2 = 4, y2 = -3
and    m1 = 2, m2 = 3
Let the required point be P(x, y)


Then comma space space space space straight x space equals space fraction numerator straight m subscript 1 straight x subscript 2 plus straight m subscript 2 straight x subscript 1 over denominator straight m subscript 1 plus straight m subscript 2 end fraction
and space space space space space space space straight y space equals space fraction numerator straight m subscript 1 straight y subscript 2 plus straight m subscript 2 straight y subscript 1 over denominator straight m subscript 1 plus straight m subscript 2 end fraction
rightwards double arrow space space space space space space space straight x equals space fraction numerator 2 left parenthesis 4 right parenthesis plus 3 left parenthesis negative 1 right parenthesis over denominator 2 plus 3 end fraction equals fraction numerator 8 minus 3 over denominator 5 end fraction equals 5 over 5 equals 1
and space space space space straight y space space equals space space fraction numerator 2 left parenthesis negative 3 right parenthesis plus 3 left parenthesis 7 right parenthesis over denominator 2 plus 3 end fraction equals fraction numerator negative 6 plus 21 over denominator 5 end fraction equals 15 over 5 equals 3

Therefore, the required point is (1, 3).

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 Multiple Choice QuestionsLong Answer Type

126.
Find the coordinates of the points of trisection of the line segment joining (4, –1) and (–2, –3).
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 Multiple Choice QuestionsShort Answer Type

127.

To conduct Sports Day activities, in your rectangular shaped school ground ABCD, lines have been drawn with chalk powder at a distance of 1m each. 100 flower pots have been placed at a distance of 1m from each other along AD, as shown in Fig. 7.12. Niharika runs 1 fourth th the distance AD on the 2nd line and posts a green flag. Preet runs <pre>uncaught exception: <b>mkdir(): Permission denied (errno: 2) in /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php at line #56mkdir(): Permission denied</b><br /><br />in file: /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php line 56<br />#0 [internal function]: _hx_error_handler(2, 'mkdir(): Permis...', '/home/config_ad...', 56, Array)
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#6 {main}</pre>th the distance AD on the eighth line and posts a red flag. What is the distance between both the flags? If Rashmi has to post a blue flag exactly halfway between the line segment joining the two flags, where should she post her flag?


Fig. 7.12

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128.

Find the ratio in which the line segment joining the points (– 3, 10) and (6, – 8) is divided by (– 1, 6).

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129.

Find the ratio in which the line segment joining A(1, – 5) and B(– 4, 5) is divided by the x-axis. Also find the coordinates of the point of division

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130.

If (1, 2), (4, y), (x, 6) and (3, 5) are the vertices of a parallelogram taken in order, find x and y

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