Page 2 - IX Math CBQ ch-10 Herons formula
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area of the trapezium
















        10    Find the area of an isosceles triangle having the base x cm and one side y cm.















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        11    A park in the shape of a quadrilateral ABCD has ∠ C = 90 , AB = 9 m, BC = 12 m, CD = 5 m, AD = 8 m.
              How much area does it occupy?
        12    Assertion: The area of a trapezium is directly proportional to the perpendicular distance between
              the parallel sides.
              Reason: The diagonal of a trapezium divides it into two triangles of equal area.



        13
              Assertion: The product of diagonals of a rhombus is equal to half the area of rhombus.
              Reason: The area of rhombus is equal to 1/2 x product of diagonals.


        14    Assertion: The sides of a triangle are in the ratio of 25 : 14 : 12 and its perimeter is 510 m. Then the
              greatest side is 250 cm
              Reason: Perimeter of a triangle = a + b +c, where a, b, c are sides of a triangle.
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