当前位置:首页>文档>8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)

8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)

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8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)
8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)
8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)
8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)
8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)
8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)
8.2立体图形的直观图同步练习(Word版含解析)_E015高中全科试卷_数学试题_必修2_02.同步练习_同步练习(第二套)

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立体图形的直观图 习题 1.用斜二测画法画水平放置的 时,若 的两边分别平行于x轴、y轴,则在直观图 中 ( ) A.45° B.135° C.45°或135° D.90° 2.如图,矩形 是水平放置的一个平面图形的直观图,其中 , ,则 原图形OABC的面积为( ) A. B. C. D. 3.对于用“斜二测画法”画平面图形的直观图,下列说法正确的是( ) A.等腰三角形的直观图仍为等腰三角形 B.梯形的直观图可能不是梯形 C.正方形的直观图为平行四边形 D.正三角形的直观图一定为等腰三角形 4.用斜二测画法画水平放置的 的直观图,得到如图所示的等腰直角三角形 .已 知点O'是斜边B'C'的中点,且 ,则 中BC边上的高为( ) A.1 B.2 C. D. 5.如图所示一平面图形的直观图,则此平面图形可能是( ) A. B. C. D. 6.如图,矩形 是水平放置的一个平面图形的直观图, 与 轴交于点 ,其中,则原图形OABC是( ) A.正方形 B.矩形 C.菱形 D.梯形 7.水平放置的 的直观图如图所示,其中 ,那么 是一 个( ) A.等边三角形 B.直角三角形 C.三边中只有两边相等的等腰三角形 D.三边互不相等的三角形 8.如图所示,己知正方形 的边长为1,它是水平放置的一个平面图形的直观图,则 其原图形的周长为( ) A.8 B. C.4 D. 9.用斜二测画法作水平放置的 的直观图 如图所示,其中 是 的 边的中点, , 分别与 轴, 轴平行,则三条线段AB,AC,AD中( ) A.最长的是AB,最短的是AC B.最长的是AC,最短的是ABC.最长的是AB,最短的是AD D.最长的是AC,最短的是AD 10.如图,已知 是水平放置的 按斜二测画法画出的直观图, 在 轴上, 与 轴垂直,且 ,则 的边AB上的高为( ) A.3 B.6 C. D. 11.用斜二测画法画出的水平放置的一角为60°,边长是4的菱形的直观图的面积是 ________. 12.关于斜二测画法,下列说法不正确的是_____________. ①原图形中平行于x轴的线段,其对应线段平行于 轴,长度不变; ②原图形中平行于y轴的线段,其对应线段平行于 轴,长度变为原来的 ; ③画与直角坐标系xOy对应的 时, 必须是45°; ④在画直观图时,由于选轴的不同,所得的直观图可能不同. 13.水平放置的 的直观图如图所示,已知 , ,则AB边上的中线的实 际长度为___________. 14.如图所示,用斜二测画法作水平放置的 的直观图,得 ,其中 , 是 边上的中线,则由图形可知下列结论中正确的是______________.(填序号) ① ;② ; ③ ; ④ . 15.如图所示,梯形 是一平面图形ABCD的直观图.若 , .试画出原四边形,并求原图形的面积.答案解析 1.答案:C 解析:在画直观图时, 的两边分别平行于 轴、 轴,所以 或135°. 2.答案:A 解析:由题可知,矩形 的面积是 . 直观图的面积:原图形的面积 , 原图形的面积是 .故选A. 3.答案:C 解析:根据“斜二测画法”的作图步骤可知,平行于x轴和y轴的线段的平行性不变,所 以正方形的直观图的对边仍是平行的,所以正方形的直观图为平行四边形,故选C. 4.答案:D 解析: 直观图是等腰直角三角形 , , , .根据直 观图中平行于y轴的长度变为原来的一半, 的BC边上的高 .故 选D. 5.答案:C 解析:根据该平面图形的直观图,该平面图形为一个直角梯形,且在直观图中平行于 轴的边与底边垂直. 6.答案:C 解析:在直观图 中, ,所以 ,易知,原图形OABC中, ,所以 ,从而原图形 OABC的四边相等,但OC与OA不垂直,所以原图形OABC为菱形. 7.答案:A 解析:由题图,知在 中, , 为等边三角形.故选A. 8.答案:A 解析:将直观图复原为原图,如图:则 , ,故 ,所以原图形的周长为 . 9.答案:B 解析: 水平放置的直观图为 , , 分别与 轴, '轴平行, 是 边的中点, 由斜二测画法规则,可知在原图形 中, ,AD为BC 边上的中线, 是以AB,BC为直角边,AC为斜边的直角三角形, .故选B. 10.答案:D 解析:如图,过 作 轴,交 轴于点 ,则 的边AB上的高CM在 直观图中为 .在 中, ,所以 .故选 D. 11.答案: 解析:菱形的面积为 ,所以其直观图的面积为 。 12.答案:③ 解析:画与直角坐标系xOy对应的坐标系 时, 也可以是135°. 13.答案:2.5解析:由于在直观图中 ,则在原图形中 , AB边上的中线为2.5. 14.答案:③ 解析:由直观图画出 如图所示.其中 , ,所以 . 15.答案:见解析. 解析:如图建立直角坐标系xOy,在x轴上截取 . 在过点D与y轴平行的直线上截取 . 在过点A与x轴平行的直线上截取 . 连接BC,使得到了原图形. 由作法可知,原四边形ABCD是直角梯形,上、下底长度分别为 ,直角腰长 为 .所以面积为 .
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  1. CONNECT:[ UseTime:0.000489s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000751s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000326s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000275s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000478s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000566s ]
  8. SELECT * FROM `wendang` WHERE `id` = 234029 LIMIT 1 [ RunTime:0.000631s ]
  9. UPDATE `wendang` SET `liulancishu` = 4 WHERE `id` = 234029 [ RunTime:0.001154s ]
  10. UPDATE `wendang` SET `lasttime` = 1772298675 WHERE `id` = 234029 [ RunTime:0.000497s ]
  11. SELECT * FROM `wendang` WHERE `id` < 234029 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000470s ]
  12. SELECT * FROM `wendang` WHERE `id` > 234029 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000395s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 234029 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001621s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 234029 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001039s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 234029 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001474s ]
0.079250s