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8th Class Mathematics Understanding Quadrilaterals Question Bank Quadrilaterals

  • question_answer
    The angles of quadrilateral are in the ratio 2 : 3 : 5 : 8. The smallest angle is

    A)  \[60{}^\circ \]                         

    B)  \[40{}^\circ \] 

    C)  \[{{20}^{{}^\circ }}\]                                   

    D)  \[{{50}^{{}^\circ }}\]

    Correct Answer: B

    Solution :

    (b): Let the angle be \[2x,3x,5x,8x\] Sum of angles of quadrilateral=360° \[\Rightarrow 2x+3x+5x+8x={{360}^{{}^\circ }}\] \[\Rightarrow 18x={{360}^{{}^\circ }}=x={{20}^{{}^\circ }}\] \[\therefore \]smallest angle \[=2x={{40}^{{}^\circ }}\] 


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