メインコンテンツ | サブコンテンツ | ||||
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center00 | The Concept of "Five centroids of triangle etc."
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center01 | Circumcenter
| Definition | In the case of two lines | To observe movement of circumcenter | To observe movement of three lines |

To find place which satisfy a condition (1) | To find place which satisfy a condition (2) | To find place which satisfy a condition (3) | Special case (1) | ||

Special case (2) | Realistic problems (1) | Realistic problems (2) | Realistic problems (2) | ||

Realistic problems (4) | Realistic problems (5) | Three circles (1) | Three circles (2-1) | ||

Three circles (2-2) | Three circles (3) | ||||

center02 | Incenter
| Definition | In the case of two lines (1) | In the case of two lines (2) | In the case of two lines (3) |

In the case of two lines (4) | |||||

center03 | Barycenter
| Definition | To find the point which satisfy a condition | ||

center04 | Orthocenter
| Definition | |||

center05 | Excenter
| Definition | |||

center06 | Fermat point
| Definition | To find the point which satisfy a condition | How to draw |