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Pure Mathematics
 Online Tutoring : Forum : Homework Help - Mathematics : Pure Mathematics
Topic Topic: formiing functions from formulas Post ReplyNew Question
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Joined: 29 September 2007
Location: United States
Posts: 2
Posted: 29 September 2007 at 8:48am | IP Logged Quote Mcool

a square is inscribed in a circle. write the area of the sqaure as a function of the radius of the circle.

i know the answer is A=2r^2. i want to know how the book got it. can u plz tell me. when i did it i got A=4r^2. can u tell me what i did wrong. and can u show how you got it.

Edited by Mcool on 29 September 2007 at 8:53am
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Joined: 15 August 2007
Location: India
Posts: 101
Posted: 29 September 2007 at 2:38pm | IP Logged Quote Amitjha

yes u consider two mutually perpendilular dia of circle as diagonals of square. Now find out the side of the square , wth the help of pythagoras theorem . it will be
. therefore area will be 2r2. which is side. Did u get it?? if not then pls lemme know

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