How about this code? Maple can not run. Please help me.

**> restart:**

**a:=2:**

**eq1:=(a^2+b^2-c^2)/(2*a*b):**

**eq2:=(b^2+c^2-a^2)/(2*b*c):**

**eq3:=(c^2+a^2-b^2)/(2*a*c):**

**sol:=solve([eq1=convert(cos(30*Pi/180), radical), eq2=cos(30*Pi/180), eq3=cos(120*Pi/180)], [b,c]);**

**with(geom3d):**

**point(o,0,0,0):**

**point(A,a,0,0):**

**sys:=solve([x^2+y^2=(rhs(op(1,sol[1])))^2,(x-a)^2+y^2=(rhs(op(2,sol[1])))^2],[x,y]);**

**point(B,rhs(op(1,op(1,sys))),rhs(op(2,op(1,sys))),0):**

**triangle(T,[o,A,B]):**

**map(coordinates,DefinedAs(T));**

**simplify(FindAngle(o,T));**

**simplify(FindAngle(A,T));**

**simplify(FindAngle(B,T));**

**line(d,[t+1,-t,-t+2],t):**

**rotation(W,T,-2*Pi/3,d):**

**map(coordinates,DefinedAs(W));**