精选数学七年级下册82 角的比较青岛版课后练习含答案解析九十九文档格式.docx

精选数学七年级下册82 角的比较青岛版课后练习含答案解析九十九文档格式.docx

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∠2=50.5^0则∠1与∠2的大小关系是（）

A、∠1=∠2

B、∠1＞∠2

C、∠1＜∠2

D、无法确定

【答案】：

【解析】：

第2题【单选题】

两个锐角的和　　　　　　　　　　　（）

A、一定是锐角

B、一定是钝角

C、一定是直角

D、可能是钝角，直角或锐角

第3题【单选题】

已知∠α=18°

18′，∠β=18.18°

，∠γ=18.3°

，下列结论正确的是（）

A、∠α=∠β

B、∠α＜∠β

C、∠α=∠γ

D、∠β＞∠γ

第4题【单选题】

如图，将一副三角板如图放置，∠COD=20°

，则∠AOB的度数为（）

A、140°

B、150°

C、160°

D、170°

第5题【单选题】

已知∠α=39°

18′，∠β=39.18°

，∠γ=39.3°

，下面结论正确的是（）

A、<

!

--{cke_protected}{C}%3C!

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