Charles Link's latest activity

Some of it depends upon who the audience is. If you have a construction worker building something, he'll know immediately what a 90...

There is an interesting text regarding degrees versus radians on...

Sometimes it's simpler to use degrees rather than radians for the measurement of angles.

Looking forward to the results. It would be cool if there was an award for the member who uses multiquote the most. It is cool when...

Make it impossible for us to leave you off :)

One of my favorite times of the year. If I'm lucky I may even get on the ballot, but it's a lot of fun in any case. :)

This year the member awards voting will be from Sunday Dec 21st to Sunday Jan 4th. There is plenty of time to still impress. Be active...

The above is a photo of a 5'0" snowman I made today, Sunday Nov. 30, 2025 in Chicago. We had about 8" of snow yesterday, but I had to...

Yes - as mentioned above the technique is strikingly similar to that employed in Diophantus II VIII which is "to divide a square into...

As I might not have time tomorrow, this is for those who do celebrate it.

@neilparker62 This parameterization method is really kind of simple once you figure it out, and it's based on solutions using the...

Perhaps worth noting (in retrospect) that you will get this equation directly by implementation of @GiorgioPastore 's suggestion in post...

I thought @hutchphd 's of post 49, (see also post 52) was simpler. I think this latest (post 73) I would call "a" most efficient...

I think the simplest way to get the result is by using the triangle with sides 2, 11, and AB in the modified figure below. The length of...