2020 AMC 10B Solution Problem1 What is the value of Solution We know that when we subtract negative numbers, .The equation becomes Problem2 Carl has cubes each having side length , and Kate has cubes each having side length . What is the total volume of these cubes?Solution A cube with ...
【详解】 如图所示: 设内切球球心为 O , O 到平面 ACM 的距离为 d ,截面圆的半径为 r , 因为内切球的半径等于正方体棱长的一半,所以球的半径为1, 又因为 VO AMC VM AOC ,所以 1 3 d SVAMC 2 3 SVAOC , 又因为 SVAMC 12 2 2 2 5 2 2 6, SVAOC 12 2 2 1 2, 所以 1...