| artifact_comments | Henry Tierney: A: 3 30, B: 10, C: 1 18 45, D: 5 Fits the formula: C = (1/20) * ((B + D)/2) * A Frim first cat addition: "Area of a trapezoid with sides of 0;30 and 0;15 and height of 3;30, correctly calculated as 1;18,45; mathematical school text" J. Friberg, MCTSC Index: a drawing of a trapezoid with length and area numbers 203, 205 C |
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