9th Class Mathematics Coordinate Geometry Question Bank Coordinate Geometry

  • question_answer
    Match the following.
    Column-I                        Column-II
    (P) The  area  of \[\Delta OAB\](i)  with  O(0,  0),A{4,  0)  and B (0,  8) is       14 sq. units            
    (Q) The area  of \[\Delta ABC\](ii)  with A (2,  0), 6(6,  0) and C (4, 6) is       16 sq. units            
    (R) The area of \[\Delta OAB\](iii) with O(0, 0),A(7, 0) and B (0,4) is       12 sq. units            
             

    A)  \[(P)\to (iii),(Q)\to (i),(R)\to (iii)\]

    B)  \[(P)\to (iii),(Q)\to (i),(R)\to (ii)\]

    C)  \[(P)\to (iii),(Q)\to (ii),(R)\to (i)\]

    D)  \[(P)\to (ii),(Q)\to (iii),(R)\to (i)\]

    Correct Answer: D

    Solution :

    (P) Area of \[\Delta OAB\] \[=\frac{1}{2}\times OA\times OB\] \[=\frac{1}{2}\times 4\times 8\] = 16 sq. units (Q) Area of \[\Delta \Alpha \Beta C\] \[=\frac{1}{2}\times 4\times 6\] \[=12\,sq.\]units (R) Area of \[\Delta {\mathrm O}\Alpha \Beta \] \[=\frac{1}{2}\times 7\times 4\] = 14 sq. units


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