Q11 of 36 Page 253

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

If the circumference of a circle is 44 then the length of a side of a square inscribed in the circle is ….


Given circumference = 44 cm


2πr = 44


πr = 22


r = 7 cm


Given that square inscribed in a circle.


so, diagonal of square will be equal to diameter of circle.


diagonal = 2 × radius = 2 × 7 = 14 cm


diagonal = √2 × side of square


14 = √2 × side


side = 7√2 cm

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11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

If the ratio of the area of two circles is 1: 4, then the ratio of their circumference …..


 11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The area of the largest triangle inscribed in a semi-circle of radius 8 is ……


 11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The length of minute hand of a clock is 14 cm. If the minute hand moves from 2 to 11 on the circular dial, then area covered by it is cm2.


 11

Select a proper option (a), (b), (c) or (d) from given options and write in the box given on the right so that the statement becomes correct:

The length of minute hand of a clock is 15 cm. If the minute hand moves for 20 minutes on a circular dial of a clock, the area covered by it is …….. cm2. (= 3.14)