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Senior | Next Rank: 100 Posts
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by likewhoa » Sun Nov 25, 2007 10:15 am
Which of the following can be a circumference of a square that is inscribed in a circle, which has a radius R?

(1) 2r * root3
(2) 2r (root3 +1)
(3)4r+root2
(4)4r*root3
(5)8r

answer: (2)
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by cris » Sun Nov 25, 2007 10:38 am
circunference of a square???

I think there is a mistake here.

Could you check that?
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by likewhoa » Sun Nov 25, 2007 8:16 pm
cris wrote:circunference of a square???

I think there is a mistake here.

Could you check that?


oopsy...sorry!
it's 'length of a square'
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by samirpandeyit62 » Mon Nov 26, 2007 12:18 am
let side of square be s

& radius of circle is r

if we join two vertices of the square to make a diagonal, then this will divide the square into two 45-45-90 trinagles

with sides as s,s,2r

hence rt(2)*s = 2r

s = rt(2)*r

does the question require only the side or something else?
Regards
Samir
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