examday

/TMUA

Laud Polygon: For any interior angle $A$, there exists an angle $B$ such that $B=2A$ or $B=\dfrac{A}{2}$.

A polygon is quiet if it is not a laud polygon.

Which of the following is/are quiet?

• I: $30^\circ,60^\circ,90^\circ$
• II: $40^\circ,80^\circ,80^\circ,160^\circ$
• III: $60^\circ,120^\circ,120^\circ,120^\circ,120^\circ$