Special Circle

Geometry Level 1

If the radius of a circle is 1 π , \frac { 1 }{ \sqrt { \pi }}, what is its area?

Instructions :

  • Do not use paper, pen or calculator.
  • Just use mind and do within 10 seconds :)


The answer is 1.

Siva Prasad by Siva prasad , 20, India

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2 solutions

As we know area of circle is π r 2 {\pi}r^2 .
Given Radius = 1 π \dfrac{1}{\sqrt{\pi}} .
Area= π × ( 1 π ) 2 {\pi}×{(\dfrac{1}{\sqrt{\pi}}})^2
π × 1 π \pi×\dfrac{1}{\pi}
⇒ 1 \Rightarrow\boxed{1}


4 Helpful 0 Interesting 0 Brilliant 0 Confused
Mohit Gupta
Dec 4, 2015

Lol....hardest ques. Of geometry ever

1 Helpful 0 Interesting 0 Brilliant 0 Confused

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