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a blue and white poster with an abstract pattern on it's back side, in the shape of a tree
Pythagoras Original (White) by JoKate85
an image of a triangle with three intersecting lines and dots in the shape of a rectangle
The Pythagorean Theorem
two pieces of pink and green colored paper are next to each other on a white surface
Mike Ollerton on Twitter
a blue and red line is drawn on top of a sheet of paper
the Pythagorean spiral
a wooden table topped with cut outs and paper
Jednotky délky