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Mental Exercise: Estimating a Circle | musefully
Bochner, Mel. Mental Exercise: Estimating a Circle, 1972. Pencil, colored pencil, and ink on paper, 22 3/8 x 30" (56.9 x 76 cm). Acquired with matching funds from Mr. and Mrs. Eugene Victor Thaw and the National Endowment for the Arts, 589.1973. (Photo: MoMA)