We know that,
Sum of all external angles of any polygon is always 3600.
So, Measure of external angle of each polygon
=3600Total number of sides
Measure of each external angle of triangle
=36003
=1200
Measure of each external angle of hexagon
=36006
=600
Measure of each external angle of pentagon
=36005
=720
Measure of each external angle of quadrilateral
=36004
=900