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# World's Hardest Easy Geometry Problem - ???

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**51**replies

**177**views Edited

**Aug 23, 2008**

Using only elementary geometry, determine angle x. Provide a step-by-step proof.

You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use more advanced trigonomery, such as the law of sines, the law of cosines, etc. There is a review of elementary geometry below.

This is the hardest problem I have ever seen that is, in a sense, easy. It really can be done using only elementary geometry. This is not a trick question.

I can't get the answer. This isn't for school either.

I've been working on it for an hour or so, and can't get it.

Can anyone else get it?

If so, please don't spoil it, just say how you got it.

## Re: World's Hardest Easy Geometry Problem - ???

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Hopefully coming to Steam in 2015!

## Re: World's Hardest Easy Geometry Problem - ???

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R.I.P. Paul Harvey (Sept. 4, 1918 - Feb. 28, 2009)

Operation Dentiform Alignment Initiated on Wednesday September 3, 2008

Heavy Enforcers Added on Tuesday October 8, 2008

## Re: World's Hardest Easy Geometry Problem - ???

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## Re: World's Hardest Easy Geometry Problem - ???

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## Re: World's Hardest Easy Geometry Problem - ???

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12325 wrote:

i could do it, im just lazy and tired, its basically just adding angles together, and looking at the opposite, and then narrowing it down untill you get X

That's what I thought, butI'm at a dead-end. The site I got it from said it's the hardest easy geometry problem. I don't know. Just bugging me now.

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## Re: World's Hardest Easy Geometry Problem - ???

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easyaspie00 wrote:

May we use theroems and postulates?

I don'tthink so.

http://thinkzone.wlonk.com/MathFun/Triangle.htm is the link to where I got it.

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