How many triangles?
How many triangles?Correct answers: 101
The first user who solved this task is Sanja Šabović.
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Dalton's atomic weightsIn 1803, John Dalton presented an essay on the absorption of gases by water, at the conclusion of which he gave a series of atomic weights for 21 simple and compound elements. He read his paper at a meeting of the Manchester Literary and Philosophical Society. |