配套习题- 正弦定理的推论 -【青果学院】

1/4单选题

难度：

1.已知△ABC中，

，则该三角形为（）

A	等腰三角形
B	等边三角形
C	直角三角形
D	不能确定

正确答案：QQ==

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

2/4单选题

难度：

2.直线

相交于点A，动点B、C分别在直线

上且异于点A，若

的夹角为60°，

，则△ABC的外接圆的面积为（）

A	2π
B	4π
C	8π
D	12π

正确答案：Qg==

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

3/4单选题

难度：

3.在△ABC中，A：B：C=1：2：3，那么三边之比a：b：c等于（　　）

A	1：2：3
B	1：：2
C	3：2：1
D	2：：1

正确答案：Qg==

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

4/4单选题

难度：

4.设三角形ABC的内角A，B，C所对的边分别为a，b，c，若

，则△ABC的形状为（）

A	锐角三角形
B	直角三角形
C	钝角三角形
D	不能确定

正确答案：Qg==

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