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April 24th, 2010, 12:43 PM   #21
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Re: Geometric Proof [hard]

No, I don't think either MY or AP are diameters, GeoGebra says so too
I think I'm giving up for today
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April 25th, 2010, 05:30 AM   #22
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In general, it is not true that MP = AY, because MY is a diameter of the circle through A, M, P, and Y, but MP is not.
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April 25th, 2010, 05:51 AM   #23
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Re: Geometric Proof [hard]

MY isn't necessarily the circle's diameter, neither is AP.

I'm starting to think the ques is not solvable
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April 25th, 2010, 06:12 AM   #24
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Re: Geometric Proof [hard]

MY is the diameter, because and are . Move p and/or a on the circle, and the angles will be 90^\circ. MY donīt move, and are diameter; MAYP can form a square if you like, to proof it, but not in the example. Do you understand that? I have been calculating on some angles and found this:
Can you find this as well?

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April 25th, 2010, 07:31 AM   #25
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Re: Geometric Proof [hard]

I think I got it, but ?AMP will have to be 90°
am I allowed to redraw the figures so this is applied?
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April 25th, 2010, 08:01 AM   #26
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Re: Geometric Proof [hard]

AMP is not necessarily 90 deg. That would mean that PY//AM. or K//AM if you like; k=PY (sort of)

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April 27th, 2010, 09:45 AM   #27
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Re: Geometric Proof [hard]

Have you found proof yet? (Is it provable anyway? Should be, I think.)
If someone could give a little help, would be appreciated.

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April 28th, 2010, 01:39 AM   #28
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Re: Geometric Proof [hard]

There are two chord quadrilaterals MAYP and MBPX, why?
Try to prove: <MXY=<MBA and <AYX=<MAP. This is not hard to prove.
What is the consequence?
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April 28th, 2010, 06:41 AM   #29
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Re: Geometric Proof [hard]

I don't think you can prove that, MAP is a lot sharper than AYX
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April 28th, 2010, 07:33 AM   #30
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Re: Geometric Proof [hard]

So you don't agree with the chord quadrilateral MAYP?

Quote:
Originally Posted by gadgou
I don't think you can prove that, MAP is a lot sharper than AYX
I'm sorry, but this is not a mathematical argument. Besides it is <MAP=<AYX.
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