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题型:解答题 难度系数:0.94 引用次数:1025 更新时间:2019/02/10 05:15:30 题号:7562311
在三棱锥eqId8619438931124624b0b0303f2ea7f1b0中, eqId033129d8056a41dc85a3645c845f16f6平面eqId9da407b1b5434c14babcd060832f27eeeqId00a0b3f000a84d31bbf082a85f6fc95deqIdc1406cebc0b44fa79dfa76c1394b050eeqId0cd8063abf2b458f80091bc51b75a904eqId93cbffaa5ae045d6ac45d1e979991c3a分别是eqId1f73fa2b9e9b4c32b1c83882935b4746eqId85602df86e6a488f8a9d451ec3a80695的中点,eqId92869ac114124367b45f631d030ed6bdeqId7412be7a456647e695421020b620936e分别是eqIdf3e8194642eb4935a003bea85efd7214eqId33cb54bd9159416b8accbd8256c9d66a的中点.
figure
(1)求证: eqId12345ad932ed49f1a5109648a48d02b5平面eqId9da407b1b5434c14babcd060832f27ee.
(2)求证:平面eqId8fdfae00f1ad4b3299e2b9a326313478平面eqId5243d62537ff4c58b2c8d8c76d2f8262.
类题推荐
【推荐1】如图,在四棱锥eqIdac097205e9cb41279269aadcac3fb6f1中,eqIde78cce043a6c43329b55788351ff3484平面eqId5ce7a06ae7a34393b92b5277978ac014,底面是棱长为eqIdf1bd69290a464f71ac73b93c51985105的菱形,eqIdf4e29b5c5e2e4fe3a5f95d0b2d442043eqIdf1a0310d8d2a464581b245ac68e3623eeqId2381423d4cd146cab95f55527681a766eqIde9b50933e347462ea824ccc9bf51fc93的中点.
figure
(1)求证:eqIdd293923b221045898dcc5442f88aa67a//平面eqId0a01245d72014cd8983f1443e0d398de
(2)求直线eqId8bf9f946e82248fea882e001e101c571与平面eqId5ce7a06ae7a34393b92b5277978ac014所成角的正切值.
难度系数:0.65使用:87次题型:解答题更新:2019/8/21
【推荐2】如图,已知eqIde78cce043a6c43329b55788351ff3484平面eqId5ce7a06ae7a34393b92b5277978ac014eqId5ce7a06ae7a34393b92b5277978ac014为矩形,eqId0c5fbe428cd444b98f0092ecd3d65b89分别为eqId09d2fd8c996e48b59689a3a72cb1a268的中点,eqId0e480e32dcfc4d368918fabe212c17e5.
figure
(1)求证:eqIde9b10279593d462aa2c60ec97aaaf665平面eqId02dc5b9712104a18adc92a366a8c2455
(2)求证:面eqId8fde520c655a4723b6f57b15b708df8c平面eqId83e13ba429bb426fb39bd7720a82c64c
(3)求点eqId8754ce8cf7f34f04abb9a0c041f57f5c到平面eqId3c71f7bb748347338d11982eeed92bf2的距离.
难度系数:0.65使用:215次题型:解答题更新:2019/8/19
【推荐3】如图,在四棱锥eqId33081a2b430e4bd680b2820b7a880223中,eqId43fe05c727b14343a0211870697669c9底面eqId5ce7a06ae7a34393b92b5277978ac014,底面eqId5ce7a06ae7a34393b92b5277978ac014为矩形,eqId93cbffaa5ae045d6ac45d1e979991c3aeqIda4133d812272499891a1f8813d5747f8的中点,且eqId7dc38438e9c54539861122a26cecb617eqIdded28dbc6ca54681ab966fe6545c6cdceqId18e3ae3e255349039d6726b8293c6cab.
figure
(1)求证:eqId3bcc9ba6cf82469f8b45715e460f1bf8平面eqId076f835a1f2c428898c79204bd1d52fd
(2)若点eqIdd5b10b2a13f148b78e0d5a1b820538fd为线段eqIda4133d812272499891a1f8813d5747f8上一点,且eqId3e9011fbf6de486b91e426416675ad20,求四棱锥eqId2297824c5fbe4f9b93b0ff509629218e的体积.
难度系数:0.65使用:119次题型:解答题更新:2019/8/20
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