approximation |
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navigate by keyword : approximation arc banner calendar chalkboard circle circumference class commemoration constant date day diameter doodle event fraction geometry gradient greek green holiday illustration irrational july letter math mathematics month number observance outline perimeter physics postcard poster radius ratio school scribble series symbol transcendental trigonometry typography vector |
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Banner of a math class with doodle drawings, date like fraction and giant pi symbol to commemorate on 22nd July the Pi Approximation Day. |
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