Would you like to sell videos?

Japanese  /  English

All videos
¥ 680 (1 month)

円を折って切ると…。 前編

目で見る算数

円を折ってその端(はし)の方を切ると…きれいな形ができます。どうしてなのでしょうか?何か共通点もありそうです。

All videos
¥ 680 (1 month)
Details of how to purchase here.
Details of how to purchase here.

Send a Tip

Choose an amount of support

  • 100yen
  • 300yen
  • 500yen
  • 1000yen
  • yen

Questions, messages of support & tips

Choose an amount of support

  • 0yen
  • 300yen
  • 500yen
  • 1000yen
  • yen
Please note that there may be no response from the shop.
For users who repeat comments judged to be malicious by the administrator, we will take measures such as access blocking.
If there is a reply to the message, it will be published on COMMUNITY.
   Please tell me your thoughts !     close