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2 Math problem, 1: The circumference of a red column in an ancient building with a small red volume is 3.77 meters, and its cross-sectional area is square meters, with one decimal place reserved.
1.3.77/3.14 =1.20m, so the area = 3.14 * 0.6 * 0.6 =1.13m2.

2.1= 3.14 * 3 *1/2-3.1.5 *1.5 = 9/4 * 3./kloc

2.2 = (5+8) * 6/2-3.14 * 3 *12 = 39-14.13 = 24.87 square centimeters (assuming your trapezoid is a right-angled trapezoid).