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Question

An equilateral triangle has area A3. Three circles are drawn with their centres at the vertices of the triangle. Diameter of each circle is equal to the length of each side of the triangle. The area of the triangle NOT included in any of the three circles is

A
A(3π6)
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B
A(π3)
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C
A(3π3)
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D
A(3π2)
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Solution

The correct option is A A(3π2)
Area of equilateral triangle =A3cm2
side=A×4=4Acm
Radius of each circle=4A2cm
Area of 3 sector=3×60360πr2
=3×16×π×(4A2)2
=Aπ2cm2
Area of the triangle not included in circle=A3Aπ2
=A(3π2)cm2

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