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The School of Athens
Euclid, as imagined by Raphael in this detail from The School of Athens.
Jamshed Al-Kashi
Al-Kashi was one of the greatest mathematicians of the 15th century, calculating the sin(1*) correct to 16 decimal places.
Al-Beruni
The 11th century scientist and philosopher managed to estimate the radius of the earth using a very creative method that employed trigonometry.
2 comments:
On problem #20, it says to "Prove what you can about AB and EF." What is that supposed to mean? I am going to see if they are equal and/or parallel, but that is not very specific- you could prove a million things such as whether or not they are coplanar, etc.
You don't have to get so worked up about it Scott. It is not being specific because as a very good question often does, it is asking you to see if you can find as much as is possible without specific prompts. Remember that geometry isn't just about answering some text book author's questions, given some made up diagram.
As for your coplanar comment, you know that parallel lines are always coplanar and so that would be obvious if you did discover that the lines were parallel.
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