GeoGebra has a lot of these built in, eg https://www.geogebra.org/graphing?command=A=(0,0);B=(1,2);C=(3,2);Polygon(A,B,C);D=TriangleCenter(A,B,C,100) https://ww

GeoGebra has a lot of these built in, eg https://www.geogebra.org/graphing?command=A=(0,0);B=(1,2);C=(3,2);Polygon(A,B,C);D=TriangleCenter(A,B,C,100) https://www.geogebra.org/graphing?command=A=(0,0);B=(1,2);C=... https://wiki.geogebra.org/en/TriangleCenter_Command https://wiki.geogebra.org/en/TriangleCenter_Command