bob012345's latest activity
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bob012345 replied to the thread High School Three Squares Problem.Here are some more solutions; In each case, the triangle constructed in green is similar to the triangle highlighted in brown which...
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BBC News once posted a challenging geometry problem from a Chinese maths exam taken aged 16, comparing it to the British exams taken at...
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This problem is another from Martin Gardner’s book Mathematical Circus but originates from a fourth grade extra credit question in a...
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Just another graphical approach:
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bob012345 replied to the thread Undergrad Three Circle Problem.
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bob012345 replied to the thread Undergrad Three Circle Problem.Here is another simple visual demonstration. The yellow is the original shaded region. The yellow plus blue is exactly half a circle...
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bob012345 replied to the thread Undergrad Three Circle Problem.The yellow area is half the original shaded area. Sorry, I should have made that more clear. I edited my post above.
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Yes, this is how you are supposed to solve that. It's similar to solving that one: Which area is greater, the red or the blue one?
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bob012345 replied to the thread Undergrad Three Circle Problem.You don’t need numbers but of course you can calculate things if you want.
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Three identical circles intersect in such a way that each intersects the centers of the other two as in the figure. The problem is to...
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