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Find the area of an equilateral triangle...

Find the area of an equilateral triangle, whose one side is a cm.

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The correct Answer is:
`(sqrt(3))/(4)a^(2)cm^(2)`
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ICSE-AREA OF A TRAPEZIUM AND A POLYGON-EXERCISE 20(D)
  1. Find the area of an equilateral triangle, whose one side is a cm.

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  2. Find the radius and area of a circle, whose circumference is : 132...

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  3. Find the radius and area of a circle, whose circumference is : 22 ...

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  4. Find the radius and circumference of a circle, whose area is : 154 c...

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  5. Find the radius and area of a circle, whose circumference is : 6.1...

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  6. The circumference of a circular table is 88 m. Find its area.

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  7. The area of a circle is 1386 sq. cm, find its circumference.

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  8. Find the area of a flat circular ring formed by two concentric circle...

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  9. Find the area of the shaded portion in each of the following diagrams...

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  10. Find the area of the shaded portion in each of the following diagrams...

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  11. The radii of the inner and outer circumferences of a circular-running...

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  12. A circular field of radius 105 m has a circular path of uniform width...

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  13. There is a path of uniform width 7 m round and outside a circular gar...

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  14. A wire, when bent in the form of a square, encloses an area of 484 c...

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  15. A wire, when bent in the form of a square, encloses an area of 196 cm...

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  16. The radius of a circular wheel is 42 cm. Find the distance travelled ...

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  17. The diameter of the wheel of a car is 0.70 m. Find the distance cover...

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  18. A bicycle wheel, diameter 56 cm, is making 45 revolutions in every 10...

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  19. A roller has a diameter of 1.4 m. Find : (i) its circumference ...

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  20. Find the area of the circle, length of whose circumference is equal t...

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  21. A piece of wire of length 108 cm is bent to form a semicircular arc b...

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