如圖所示,AB的長度為?()
A.79.76 B.77.76 C.80.76 D.78.76
將如圖所示多段線進行擬合,擬合后的面積為?()
A.3974.55 B.4176.55 C.3600.00 D.3979.55
A.338.35 B.83.15 C.372.59 D.69.45