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Tick the correct answer in the following and justify your choice : If the perimeter and area of a circle are numerically equal, then the radius of the circle is

A

2 units

B

`pi` units

C

4 units

D

7 units

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MBD-Areas of Plane Figures.-Exercise
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  14. In a circle of radius 21 cm, an arc subtends an angle of 60° at the ce...

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  15. The radius of a semi-circular protactor is 14 cm. Find its perimeter a...

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  16. The circumference of a circle is 88 cm. Find the area of the sector, w...

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  17. The perimeter of a sector of a circle of radius 5.8 m is 27.2 m. Find ...

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  18. A chord of a circle of radius 21 cm subtends an angle of 120^@ at the ...

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  19. Find the radius of the circle if length of the arc is 4pi cm and angle...

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  20. A square is made inside the circle. Find the area of that portion of t...

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  21. In the fig. fourth quadrant of a circle is OACB where O is the centre ...

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