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3. fail of the Roman Empire
Lewis and Clark ended their expedition on March 23rd 1806
The Principia Mathematica was written by Alfred North Whitehead
Map the triangle on the graph. Input A, B, and C.
Then, you can just flip it over the x axis. To make it simple, you can do (x,y) -> (-x, y). Map the remainder of the triangle across the x axis. If you have any questions, please comment.