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量角器的使用同步练习 (1)

量角器的使用同步练习

一、填空

1. 度量角的大小可以用（），它是把半圆平均分成（）份，其中的1份所对应的角的大小叫做（）度，记作：（）。

2. 量角时，将量角器的（）和角的（）重合，角的（）和量角器的（）对齐，角的（）所对的量角器上的刻度，就是这个角的度数。

3. 圆心就是量角器的（），量角器有（）圈刻度。

4. 外圈刻度（顺时针方向）从（）度开始到（）度止，内圈刻度（逆时针方向）是从（）度开始到（）度止。

5.角的大小和什么有关（）

三、量一量，再算一算。

1. 请你试着量一量∠A 的度数。

2. 请你试着量一量∠B 的度数。

3. ∠A＋∠B＝？

4.量出下面各角的度数。

( )度 ( )度 ( )度

5. 数一数各有几个角再量出它们的度数

量角器的使用同步练习参考答案关卡一神笔填空

1. 量角器，180，1，1°

2. 中心点，顶点；一条边，0°刻度线；另一条边

3. 刻度线，10

4. 中心点，两

5. 0，180；0，180

关卡二包公断案

1. 错

2. 对

3. 对

关卡三量一量，再算一算。

1. ∠A＝120°

2. ∠B＝120°

3. ∠A＋∠B＝120°＋120°＝240°

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一量块的用途和精度 (30) 二成套量块和量块尺寸的组合 (30) 三量块附件 (31) 第五章指示式量具 (33) 一百分表的结构 (33) 二百分表和千分表的使用方法 (33) 三杠杆百分表 (37) 四杠杆百分表和千分表的使用方法 (37) 五内径百分表 (40) 六内径百分表的使用方法 (41) 第六章角度量具 (42) 一万能角度尺 (42) 二游标量角器 (43) 三万能角尺 (44) 四带表角度尺 (44) 五中心规 (45) 六正弦规 (45) 七车刀量角台 (47) 第七章水平仪 (49) 一条式水平仪 (49) 二框式水平仪 (50) 三光学合像水平仪 (53) 第八章量具的维护和保养 (55) 参考文献 (56)