8th Class Mathematics Sample Paper Mathematics Sample Paper - 5

  • question_answer
    Find the area of quadrilateral ABCD as shown in the figure.

    Answer:

    Quadrilateral is divided into triangle.
    Here, \[{{h}_{1}}=13\text{ }m,\text{ }{{h}_{2}}=8\text{ }m\] and AC = 24 m
    Area of quadrilateral ABCD
    = Area of \[\Delta ADC\]+ Area of \[\Delta ABC\]
    \[=\frac{1}{2}\times b\times {{h}_{1}}+\frac{1}{2}\times b\times {{h}_{2}}\]
    \[=\frac{1}{2}\times 24\times 13+\frac{1}{2}\times 24\times 8\]
    \[=12\times 13+12\times 8\]
    = 156 + 96
    \[=\text{ }252\text{ }{{m}^{2}}\]
    The area of quadrilateral field\[=\text{ }252\text{ }{{m}^{2}}\].


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