8th Class Mathematics Squares and Square Roots Question Bank Square and Square Roots

  • question_answer
    Use the inform anon given in the diagram to find.
    (A) Height of the triangle
    (B) The area of the triangle.

    A)  \[5\,cm,\text{ }6.8\,c{{m}^{2}}\]        

    B)  \[3\,cm,\text{ }4.8\text{ }c{{m}^{2}}\]

    C)  \[3\,cm,\text{ }6.8\text{ }c{{m}^{2}}\]         

    D)  \[6\,cm,\text{ }4.8\text{ }c{{m}^{2}}\]

    Correct Answer: B

    Solution :

    (b): \[h=\sqrt{{{3.4}^{2}}-{{1.6}^{2}}}\] \[=\sqrt{(3.4+1.6)(3.4-1.6)}\] \[=3.0\,cm\] Area =\[\frac{1}{2}\times 3\times 3.2=4.8c{{m}^{2}}.\]

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