主题:【求解】儿子的数学题,10年级,我不会。 -- 李侠东
脸红,来此请教,多谢。
A semi-circle of radius 8 cm, rocks back and forth along a line. The distance between the line on which the semi-circle sits and the line above is 12 cm, As it rocks without slipping, the semi-circle touches the line above at two points. ( When the semi-circle hits the line above it immediately rocks back in the other directions). The distance between these two points, in millimetres, is closest to (A) 55 (B) 53 (C)51 (D) 49 (E) 47
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🙂【求解】儿子的数学题,10年级,我不会。
🙂这道题根本不需要计算 颜赤城 字75 2007-02-12 10:37:37
🙂答案是A, 1 正宗鲁皮皮 字67 2007-02-07 16:22:30
🙂算出是54点多mm应该是A,大洋芋的图do a lot help 1 加楠 字0 2007-02-07 16:20:25
🙂应该是E吧。。。 1 半饱 字48 2007-02-04 16:40:45
🙂55mm 1 枸杞子 字31 2007-02-03 19:52:02
😜这花俺也得的脸红了, 连题目都没看清. 1 丁不二 字0 2007-02-03 19:16:51
🙂A 2 夏翁 字181 2007-02-03 18:43:23