Math Is Fun Forum

Agnishom

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From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

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Circle, diameter and chord

Only clues visible are that is a circle and the two line segments are perpendicular, prove that one of them is a diameter(if it is) and calculate angle A. Please enlarge my pic if required

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'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
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Bob

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Registered: 2010-06-20

Posts: 10,583

Re: Circle, diameter and chord

hi Agnishom,

The diagram makes it look like it is a diameter.  So I tried and tried to prove this.

Then it occurred to me to try and draw it without that line being a diameter, whilst maintaining the right angle.

See diagram.

If that's all you are given then it doesn't have to be a diameter at all.

If it is then A = 90.

Bob

Last edited by Bob (2011-12-03 06:22:19)

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