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Its length is 12 cm because 2(12+10) = 44 cm
44 - 4 = 40 40 / 4 = 10
37 * * * * * No. Total surface area = Lateral area + 2*base area = 10*3 + 2*7 = 30 + 14 = 44 sq units.
About 44 1/2 square yards. (20' x 20' = 400 square feet = 400/9 square yards = 44.44444 square yards)
4 decagons = 4*10 = 40 sides 1 quadrilateral = 4 sides Total 40+4 = 44 sides.