几何

黄理超, Apr 11, 2020

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Table of Contents

  1. 1
    1. Ábaco japonés (soroban)
    2. 2013黑龙江龙东第10题
    3. 等周长的正方形和圆的面积比较
  2. 2
    1. 勾股定理1
  3. 3
    1. Proof Without Words

1.

1

  • 1. Ábaco japonés (soroban)
  • 2. 2013黑龙江龙东第10题
  • 3. 等周长的正方形和圆的面积比较

1.1.

Ábaco japonés (soroban)

Ábaco japonés de 6 varillas
Ábaco japonés (soroban)
– José Luis Álvarez García

1.2.

–

1.3.

–

2.

2

  • 1. 勾股定理1

2.1.

勾股定理1

– 黄理超

3.

3

  • 1. Proof Without Words

3.1.

Proof Without Words

Drag the points in the sketch below.[br]What do you notice? What does this prove? How does this prove it?
– Steve Phelps

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