问题 解答题

梯形的面积一定比平行四边形的面积小.______.(判断对错)

答案

可以用举例法证明:

设梯形的上底为10厘米,下底为20厘米,高为10厘米,平行四边形的底为8厘米,高为8厘米,高为2厘米,

梯形的面积为:(10+20)×10÷2

=30×10÷2,

=300÷2,

=150(平方厘米),

平行四边形的面积为:8×2=16(平方厘米);

所以题干中没有相应的数据所以不能判断梯形的面积和平行四边形的面积之间的大小关系;

故答案为:错.

完形填空
完型填空(15分)
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小题1:
A.classroomB.subjectC.classD.school
小题2:
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小题3:
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小题4:
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小题5:
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小题14:
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小题15:
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