26.7.2  Isosceles triangles in the plane

See Section 27.6.2 for isosceles triangles in space.

The isosceles_triangle command creates isosceles triangles.

• isosceles_triangle takes three mandatory arguments and one optional argument:
  • a,b, two points.
  • θ, an angle.
  • Optionally, var, a variable name.
• isosceles_triangle(a,b,θ ⟨,var ⟩) returns and draws the isosceles triangle abc, where ab and ac are equal sides and θ is the angle between ab and ac.

  With the argument var, c will be assigned to var.

Examples