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Area of equilateral triangle of side 'a'...

Area of equilateral triangle of side 'a' units is …….. sq. units.

A

`1/ sqrt 3 a^2`

B

`4/ sqrt 3 a^2`

C

`sqrt 3 / 4 a`

D

`sqrt 3 / 4 a^2`

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BEYOND PUBLICATION-MENSURATION-EXERCISE
  1. Heap of stones is an example of

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  2. In the figure, l^2 =…………

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  3. Area of equilateral triangle of side 'a' units is …….. sq. units.

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  4. Perimeter of square is 20 cm then A = ………. cm^(2).

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  5. Diagonal of rectangle is ………. units.

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  6. Volume of hollow cylinder is ….

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  7. ……… gave the symbol pi.

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  8. In a cone, (l+r)(l-r) = ………

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  9. A cuboid has dimensions 10 times 8 times 6 cm then its volume is ……..c...

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  10. CSA of a cone is 4070 cm^(2) and its diameter is 70 cm then slant heig...

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  11. The sphere is of radius 2.1 cm then its volume is ………. cm^(3).

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  12. In l^(2)=h^(2)+r^(2), h=15, r=8 then l = ……….

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  13. The surface area of a sphere is 616 sq.cm. then its radius is …… cm.

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  14. In a cone, d = 14 cm, l = 10 cm then CSA = …………. cm^(2).

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  15. In a cube, a = 8 cm then TSA = ……….. cm^(2).

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  16. Number of edges of a cuboid is ……

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  17. If the diagonals of a rhombus are 10 cm and 24 cm then area is ……. cm^...

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  18. Volume of cone with d as diameter and h as height is ……… units^(3).

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  19. The area of the base of a right circular cone is 78.5 cm^(2). If its h...

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  20. The volume of a cuboid is 3,60,000 cm^(3). If its area is 5,600 cm^(2)...

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