SolveItClass 10 · NCERT

NCERT Solutions · Class 10 Mathematics Coordinate Geometry

20 questions · 20 still being checked

EXERCISE 7.1 1–10 (part 1 of 2)

  1. Exercise 1

    Find the distance between the following pairs of points:
    (i)
    (2,3)\displaystyle (2, 3), (4,1)\displaystyle (4,1)
    (ii)
    (5,7)\displaystyle (-5, 7), (1,3)\displaystyle (-1, 3)
    (iii)
    (a,b),(a,b)\displaystyle (a, b),(-a,-b)
    NCERT’s answer
    (i)
    $\displaystyle 2 \sqrt{2}$ (ii) $\displaystyle 4 \sqrt{2}$ (iii) $\displaystyle 2 \sqrt{a^{2}+b^{2}}$

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  2. Exercise 2

    Find the distance between the points (0,0)\displaystyle (0,0) and (36,15)\displaystyle (36, 15). Can you now find the distance between the two towns A and B discussed in Section 7.2.
    NCERT’s answer
    $\displaystyle 39$; $\displaystyle 39$ km

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  3. Exercise 3

    Determine if the points (1,5)\displaystyle (1, 5), (2,3)\displaystyle (2, 3) and (2,11)\displaystyle (-2, -11) are collinear.
    NCERT’s answer
    No

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  4. Exercise 4

    Check whether (5,2)\displaystyle (5, -2), (6,4)\displaystyle (6, 4) and (7,2)\displaystyle (7, -2) are the vertices of an isosceles triangle.
    NCERT’s answer
    Yes

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  5. Exercise 5

    In a classroom, 4\displaystyle 4 friends are seated at the points A, B, C and D as shown in Fig. 7.8. Champa and Chameli walk into the class and after observing for a few minutes Champa asks Chameli, "Don't you think ABCD is a square?" Chameli disagrees. Using distance formula, find which of them is correct.NCERT_Question_Class10_Maths_Ch7_Ex7-1_Q5
    NCERT’s answer
    Champa is correct.

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  6. Exercise 6

    Name the type of quadrilateral formed, if any, by the following points, and give reasons for your answer:
    (i)
    (1,2)\displaystyle (-1, -2), (1,0)\displaystyle (1, 0), (1,2)\displaystyle (-1, 2), (3,0)\displaystyle (-3, 0)
    (ii)
    (3,5)\displaystyle (-3, 5), (3,1)\displaystyle (3, 1), (0,3)\displaystyle (0, 3), (1,4)\displaystyle (-1, -4)
    (iii)
    (4,5)\displaystyle (4, 5), (7,6)\displaystyle (7, 6), (4,3)\displaystyle (4, 3), (1,2)\displaystyle (1,2)
    NCERT’s answer
    (i)
    Square (ii) No quadrilateral (iii) Parallelogram

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  7. Exercise 7

    Find the point on the x\displaystyle x-axis which is equidistant from (2,5)\displaystyle (2, -5) and (2,9)\displaystyle (-2, 9).
    NCERT’s answer
    $\displaystyle (-7,0)$

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  8. Exercise 8

    Find the values of y\displaystyle y for which the distance between the points P(2,3)\displaystyle (2, -3) and Q(10\displaystyle 10, y) is 10\displaystyle 10 units.
    NCERT’s answer
    -$\displaystyle 9,3$

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  9. Exercise 9

    If Q(0,1)\displaystyle \mathrm{Q}(0,1) is equidistant from P(5,3)\displaystyle \mathrm{P}(5,-3) and R(x,6)\displaystyle \mathrm{R}(x, 6), find the values of x\displaystyle x. Also find the distances QR and PR.
    NCERT’s answer
    $\displaystyle \pm 4, \mathrm{QR}=\sqrt{41}, \mathrm{PR}=\sqrt{82}, 9 \sqrt{2}$

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  10. Exercise 10

    Find a relation between x\displaystyle x and y\displaystyle y such that the point (x,y)\displaystyle (x, y) is equidistant from the point (3,6)\displaystyle (3,6) and (3,4)\displaystyle (-3, 4).
    NCERT’s answer
    $\displaystyle 3 x+y-5=0$

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