数学选择题1.以不在同一直线上的
1。以不在同一直线上的三点作平行四边形的三个顶点,则可作出平行四边形的个数是C。3个
C
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```\````````/````\`````/
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``````A\/----------/B
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1。以不在同一直线上的三点作平行四边形的三个顶点,则可作出平行四边形的个数是C。3个
C
。\------------/\---------/
。。\。。。
。。。。。。。/``\-------/
```\````````/````\`````/
````\``````/``````\```/
`````\````/````````\`/
``````\``/``````````/
``````A\/----------/B
````````\`````````/
`````````\```````/
``````````\`````/
```````````\```/
````````````\`/
2。
以线段a=16,b=13,c=10,d=6为边画梯形,其中a,c作为梯形的两底,这样的梯形D。不能作
其根据是三角形两边之和大于第三边。
3。菱形具有而平行四边形不一定具有的特征是
C。
对角线平分一组对角
。收起
