Given data:
The angle of rotational symmetry for square is,
[tex]\begin{gathered} A=\frac{360^{\circ}}{4} \\ =90^{\circ} \end{gathered}[/tex]The angle of rotational symmery for equilateral triangle is,
[tex]\begin{gathered} B=\frac{360^{\circ}}{3} \\ =120^{\circ} \end{gathered}[/tex]Angle of rotational symmetry of the regular polygon is sum of the central angle divided by number of sides of polygon.
Thus, the measure of the interior angle concept is wrong.
