2. Questions Bank
  3. 9th Class
  4. Mathematics
  5. Geometry

9th Class Mathematics Geometry Question Bank Geometry

  • question_answer
    If the sum of all interior angles of a convex polygon is 1440., then the number of sides of the polygon is

    A)  8                            

    B)         10

    C)  11                         

    D)         12  

    Correct Answer: D

    Solution :

      If n is the number of sides of the polygon, then \[(2n-4)\times {{90}^{o}}=1440\]                 or            \[2n=20\]                 or            \[n=10\]


You need to login to perform this action.
You will be redirected in 3 sec spinner