6時に長針と短針の作る角度は
![](https://image.jimcdn.com/app/cms/image/transf/dimension=281x10000:format=png/path/s74b25d56bf923adb/image/if6a8e81ef8b547ac/version/1666829314/image.png)
180°
3時は
![](https://image.jimcdn.com/app/cms/image/transf/dimension=281x10000:format=png/path/s74b25d56bf923adb/image/ib11b2d12afacce17/version/1666829316/image.png)
90°
以上のことから、となり合う点と点(時字)の間の角度は30°とわかる
![](https://image.jimcdn.com/app/cms/image/transf/dimension=281x10000:format=png/path/s74b25d56bf923adb/image/i093179e0cb23b804/version/1666829324/image.png)
3時半は?
![](https://image.jimcdn.com/app/cms/image/transf/dimension=265x10000:format=png/path/s74b25d56bf923adb/image/i70758d606b511354/version/1666829331/image.png)
短針は30分でとなり合う点と点の間の半分を動く
![](https://image.jimcdn.com/app/cms/image/transf/dimension=277x10000:format=png/path/s74b25d56bf923adb/image/ibb364fcb2621f244/version/1666829339/image.png)
その角度は30°の半分で15°
![](https://image.jimcdn.com/app/cms/image/transf/dimension=316x10000:format=png/path/s74b25d56bf923adb/image/i2b15cc0b27c14cbb/version/1666832704/image.png)
3時半の作る角度は
15°+30°+30°=75°
6時に長針と短針の作る角度は
180°
3時は
90°
以上のことから、となり合う点と点(時字)の間の角度は30°とわかる
3時半は?
短針は30分でとなり合う点と点の間の半分を動く
その角度は30°の半分で15°
3時半の作る角度は
15°+30°+30°=75°
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