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【20秒で証明】三平方の定理 #shorts

三平方の定理を証明します。（中学３年生） ✅直角三角形は 横 ² ＋ 縦 ² ＝ 斜め ² が成り立つ。これを三平方の定理という。 🎥関連動画🎥 ✅【世界が変わる裏技】三平方の定理を５秒で計算するテ...

2021-08-28 18:00:27 有 9,887 人看過 有 388 人說讚

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【電気分解】陽極・陰極の反応（全パターン）【高校化学】酸化還元＃９

電気分解（陽極・陰極で起こる反応）のポイントをまとめるよ！ ✅陽極での反応は、 ❶基本は、電極の金属が電子を渡す。 ❷電極が白金や金、炭素のときは例外的に17族元素かOH－のイオンが電子を渡す。 ❸電...

2021-08-25 18:00:05 有 3,174 人看過 有 121 人說讚

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【証明】垂心の性質【高校数学】公式の証明＃２４

垂心の性質を証明します。 ✅「垂心の性質」の授業動画 授業動画▶https://youtu.be/tP5FsRoqql4 センター試験類題解説▶https://youtu.be/e1Oo0VvW1v...

2021-08-23 18:00:32 有 3,362 人看過 有 190 人說讚

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中点連結定理【中学数学】平面図形＃１４

中点連結定理（中学３年生）のポイントは！ ・三角形の底辺でない２つの辺に中点を２点とって連結すると ❶底辺と平行になる ❷長さは底辺の半分になる ・中点が２点以上出てきたら中点連結定理を疑おう 🎥関...

2021-08-21 18:00:02 有 2,924 人看過 有 147 人說讚

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電気分解とは｜陽極・陰極での反応【高校化学】酸化還元＃８

電気分解のポイントをまとめるよ！ ✅電気分解は、外部電源をつないで、電子を無理やり走らせて 酸化還元反応を起こすことで溶液にあるイオンを純粋な物質（単体）として取り出す操作のこと。 ✅電源の負極に繋が...

2021-08-19 18:00:23 有 3,827 人看過 有 154 人說讚

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【本日】8/22(日）ライブします。

🔥8/22（日）質問コーナー型ライブ（夏休み特別版）開催🔥 ✅アーカイブは残しません！ ８月のライブで✨高評価300✨を達成したので、８月は夏休み特別版ということでもう１回ライブを開催します！（高評価...

2021-08-17 18:00:08 有 2,566 人看過 有 104 人說讚

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【証明】 外心の性質【高校数学】公式の証明＃２３

外心の性質を証明します。 ✅「外心の性質」の授業動画 授業動画▶https://youtu.be/2tlQWnWHawM 【同志社大】過去問解説▶https://youtu.be/gUvIwRDxn...

2021-08-16 18:00:16 有 3,049 人看過 有 184 人說讚

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平行線と線分の比【中学数学】平面図形＃１３

平行線と線分の比のポイントは！ ✅線分を平行移動すると、ピラミッド型の三角形ができるから、平行線に切り取られた線分の比が一致する 🎥関連動画🎥 ✅平行線と対頂角・錯角・同位角 ▶https://yo...

2021-08-14 18:00:20 有 1,938 人看過 有 90 人說讚

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ボルタ電池の真実【高校化学】酸化還元

ボルタ電池のポイントをまとめるよ！ ✅亜鉛と水素イオンから、亜鉛イオンと水素ができる酸化還元反応をメインの反応として 亜鉛を片方の電極に、水素イオンをもう片方の溶液に配置した電池をボルタ電池という。 ...

2021-08-11 18:00:20 有 2,975 人看過 有 69 人說讚

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鉛蓄電池【高校化学】酸化還元＃７

鉛蓄電池のポイントをまとめるよ！ ✅鉛と酸化鉛の酸化還元をメインの反応として 鉛と酸化鉛を電極に、硫酸を電極に配置した電池を鉛蓄電池という。 ✅ダニエル電池で聞かれるポイントは２つ！ ❶鉛蓄電池の充電...

2021-08-09 18:00:12 有 2,394 人看過 有 84 人說讚