(本题满分9分)如图,在中,,,把边长分别为的个正方形依次放入中,请回答下列问题:(1)按要求填表(2)第个正方形的边长       ;(3)若是正整数,且,试

(本题满分9分)如图,在中,,,把边长分别为的个正方形依次放入中,请回答下列问题:(1)按要求填表(2)第个正方形的边长       ;(3)若是正整数,且,试

题型:不详难度:来源:
(本题满分9分)如图,在中,,把边长分别为个正方形依次放入中,请回答下列问题:
(1)按要求填表

(2)第个正方形的边长       
(3)若是正整数,且,试判断的关系.
答案
(1)·············································································· 6分
(2).························································································· 8分
(3)
····································································· 10分
.·············································································· 11分
.·················································································· 12分
解析

举一反三
如图,在四边形ABCD中,AD∥BC,若∠DAB的平分线AE交CD于E,连结BE,且BE也平分∠ABC,则以下的命题中正确的个数是(    )

①BC+AD=AB            ②E为CD中点
③∠AEB=90°           ④S△ABE=S四边形ABCD
A.1B.2C.3D.4

题型:不详难度:| 查看答案
(本题8分)利用一面长45米的墙,用80m长的篱笆围成一个矩形场地。
⑴怎样才能使矩形场地面积为750㎡?
⑵能否使所围矩形场地的面积为810㎡,为什么?
题型:不详难度:| 查看答案
在四边形ABCD中,∠A:∠B:∠C:∠D有下列几组比值。其中能判断四边形ABCD
是等腰梯形的是
A.1:2:3:4B.1:3:3:2C.1:2:2:1D.1:2:1:2

题型:不详难度:| 查看答案
如图1所示,将矩形纸片先沿虚线AB按箭头方向向右对折,接着将对折后的纸片沿虚线CD向下对折,然后剪下一个小三角形,再将纸片打开,则打开后的展开图是

           
A.        B.              C.       D.
题型:不详难度:| 查看答案
.如图,在梯形ABCD中,∠A=∠B=90°,∠C=45°,AB=4cm,AD=5cm,
则BC=              cm.
题型:不详难度:| 查看答案
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