# Get your calc on

March 23, 2003 10:56 AM Subscribe

Webcalc solves over 100 different equations online.

Neat. But it would be cooler (and more useful for the school crowd) if it had the proofs too.

posted by degnarra at 11:04 AM on March 23, 2003

posted by degnarra at 11:04 AM on March 23, 2003

O fer chrissake. How to find the perimeter of a triangle, given the lengths of the sides? You've got to be kidding.

posted by gleuschk at 11:04 AM on March 23, 2003

posted by gleuschk at 11:04 AM on March 23, 2003

You're right gleuschk, that is a little facile. I found this one to be a bit of a no-brainer as well.

posted by walrus at 11:19 AM on March 23, 2003

posted by walrus at 11:19 AM on March 23, 2003

Too bad it doesn't check for validity. I did the above triangle calculation with lengths 1, 1 and 100. Sure enough, it gave be a perimeter of 102. It also accepts non-positive lengths.

But overall, quite handy if you already have some mathmatical sense.

posted by Monk at 11:19 AM on March 23, 2003

But overall, quite handy if you already have some mathmatical sense.

posted by Monk at 11:19 AM on March 23, 2003

Much more interesting to me is tools like the Fair Division calculator which you can use to fairly divide rent or pies among a number of people.

posted by vacapinta at 11:27 AM on March 23, 2003

posted by vacapinta at 11:27 AM on March 23, 2003

Quick Math. Used in combination with SOS Math were a pair I found useful in school..

posted by Mossy at 11:44 AM on March 23, 2003

posted by Mossy at 11:44 AM on March 23, 2003

I should also mention this huge list of practical calculators online.

posted by vacapinta at 11:47 AM on March 23, 2003

posted by vacapinta at 11:47 AM on March 23, 2003

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posted by davidmsc at 11:01 AM on March 23, 2003