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HKIMO 2026 Grade 9 National Preliminary Set 02 Question 18

HKIMO · HKIMO 2026 Grade 9 National Preliminary Set 02

Question 18

Find the sum of the interior angles of a regular 18-sided polygon.
  1. $3240^\circ$
  2. $2700^\circ$
  3. $2880^\circ$
  4. $3060^\circ$