メインコンテンツ | サブコンテンツ | ||||
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4p4p00 | The Concept of "Quadrangle→Quadrangle"
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4p4p01 | Connecting the midpoints of four sides
| Exploring correspondence | In the condition of particular shape | In the condition of particular shape | In the condition of particular shape |

4p4p02 | Bisectors of four corners
| Exploring correspondence | In the condition of particular shape | Always parallelogram | |

4p4p03 | Perpendicular bisectors of four sides
| Exploring correspondence | In the condition of particular shape | Always parallelogram | The result is one point |

The result is one point/Sets of corresponding points | |||||

4p4p04 | Perpendiculars from four corners to diagonals
| In the case of rectangle | In the case of parallelogram | In the case of square | In the case of general quadrangle |