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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.
5 comments:
I'm having some trouble on #10. I just don't know where to start... If I had a starting point, I could probably get the answer...
I'm having trouble with number 12, could anyone help me get started?
Michael, I am not sure if this is right, but I added a transversal that was also the angle bisector of A and C. Then I could prove the two lines are parallel.
In number 11, what does it mean by angles C,D,E are proportional to the numbers 4, 3, 4?
It means that if the x is a variable, angle c =4x, angle d= 3x, and angle e= 4x
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