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HKIMO 2026 Grade 7 National Preliminary Set 04 Question 19

HKIMO · HKIMO 2026 Grade 7 National Preliminary Set 04

Question 19

A triangle’s interior angles are in the ratio $3:5:4$. Find the smallest exterior angle.
  1. $135^\circ$
  2. $45^\circ$
  3. $105^\circ$
  4. $75^\circ$