- #1

geometry

- Thread starter geometry
- Start date

- #1

geometry

- #2

- 11

- 0

Hello Geometry,

See http://mathworld.wolfram.com/Nine-PointCircle.html

I think the sketch with four points A,B,C and D,four ninepoint circles ,two obtuse and two acute triangles are the ones you'r looking for.

Regards.

Last edited:

- #3

selfAdjoint

Staff Emeritus

Gold Member

Dearly Missed

- 6,786

- 8

The nine point circle works with general triangles. Maybe you're drawing something wrong.

- Last Post

- Replies
- 6

- Views
- 3K

- Replies
- 3

- Views
- 923

- Last Post

- Replies
- 41

- Views
- 9K

- Last Post

- Replies
- 3

- Views
- 7K

- Replies
- 26

- Views
- 22K

- Last Post

- Replies
- 2

- Views
- 864

- Last Post

- Replies
- 8

- Views
- 2K

- Last Post

- Replies
- 5

- Views
- 2K

- Last Post

- Replies
- 1

- Views
- 1K

- Last Post

- Replies
- 6

- Views
- 10K