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August 22, 2014

August 22, 2014

Posted by **Lian** on Thursday, November 24, 2011 at 7:24am.

- geometry -
**Reiny**, Thursday, November 24, 2011 at 8:39amdraw the top part of the cut-off

let each side of the octagon be x m

let the amount that has to be cut off be y

I see a right-angled triangle with hypotenuse x and the other 2 sides are y

x^2 = y^2 + y^2

x^2 = 2y^2

x = 2√y or y = x/√2

now along the top of the original square:

y + x + y = 2

x/√2 + x + x/√2 = 2

times √2

x + √2x + x = 2√2

x(√2+2) = 2√2

x = 2√2/(√2+2)

rationalizing:

x= 2√2/(√2+2) * (√2-2)/(√2-2)

= 2√2 - 2 or appr 0.8284

- LIAN!!! - geometry -
**Reiny**, Thursday, November 24, 2011 at 8:44amI just noticed that you posted this same question 9 times !

and it had already been answered.

Very annoying.

Don't you check back to see if somebody answered your earlier question??

- geometry -
**Lian**, Thursday, November 24, 2011 at 9:09ami didnt know i posted it 9 times. i always check back the page if my question is answered. hahaha. i keep on refreshing it. lol. THANK YOU SO MUCH!!

- geometry -
**Steve**, Thursday, November 24, 2011 at 7:28pmHmmm. A good lesson. We have been attributing to malice what was done in ignorance.

So, Lian, once the question is posted, go back to the main list, and click in your link. Then you can refresh the page without reposting the question.

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