#12
Draw a triangle connecting all 3 vertices.
![Draw a triangle connecting all 3 vertices.](https://www.geogebra.org/resource/CVGznBVs/clNvgQ5QMrpBDis0/material-CVGznBVs.png)
Construct the perpendicular bisectors if you want the circumcenter to put a circle outside the triangle. Construct the angle bisectors if you want the incenter to put a circle inside the triangle.
![Perpendicular bisector, click on the sides.
Angle bisector, click on 3 vertices with the angle you want bisected in the center.](https://www.geogebra.org/resource/z7J9Mxrr/VC8yoNYFTLrHVaVs/material-z7J9Mxrr.png)
Construct the circle.
![Construct the circle.](https://www.geogebra.org/resource/mT3JFj4R/x2VsxqNJMl0vkiCp/material-mT3JFj4R.png)