A regular polygon has interior angles of 160°. Find the number of sides of the polygon.
Practice 1 - Question 2
A polygon has n sides. Four of its exterior angles are 18°, 26°, 34° and 46°. Each of the interior angles at the other vertices are 121°. Find the value of n.
Practice 1 - Question 3
Each interior angle of a 20-sided regular polygon is 5.4 times larger than each exterior angle of an n-sided polygon. Find the value of n.
Practice 1 - Question 4
In the diagram, ABCDE is a pentagon in which AB is parallel to ED. Given that \(\angle ABC=132°\) and \(\angle EAB=\angle BCD=\angle CDE=w°\), calculate the value of w. State your reasons clearly.