小明放风筝时不小心将风筝落在了4.8m高的墙头上,他请爸爸帮他取.爸爸搬来梯子,将梯子稳定摆放(梯子底端离墙的距离约为梯子长度的
),此时梯子顶端正好达到墙头,爸爸问小明梯子的长度有没有5m?你能帮助小明一起算吗?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
更新时间:2020-04-18 00:02:25
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解答题-问答题
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较易
(0.85)
【推荐1】如图,矩形
中,对角线
,
相交于点O,
,
.
(2)求
的长;
(3)求矩形面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)求矩形面积.
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解答题-计算题
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较易
(0.85)
【推荐2】(1)计算:
①
;
②
;
(2)在
中,
.
①已知
,
,求
;
②已知
,
,求a,c.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08420ad3340200961d376033b34d7e77.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0fcec59c901b805b1b2cf0c5a98c71.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
①已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd4dfd596e8021e85ed3e39fd1d874c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②已知
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您最近一年使用:0次