(ii) hence, copy and complete the table: Number of sides of a polygon N
3
4 5 6
(iii) write down a formula for Tn
(b) What is the sum of the interior angles of a decagon (a 10-sided fi gure)? (c) How many sides does a polygon have if the sum of the interior angles is 3780°?
11. Copy and complete the tables below: (a) Pattern number n