Skip to content / Đến nội dung
ThichHocToan.com

VTMO 2026 - Grade 7 - Semifinal - SET 5 - Self-study Question 15

VTMO · VTMO 2026 - Grade 7 - Semifinal - SET 5 - Self-study

Question 15

In triangle $ABC$, $\angle A=3\angle B=\tfrac12\angle C$. Find $\angle A$.

Question illustration
  1. $30^\circ$
  2. $36^\circ$
  3. $54^\circ$
  4. $60^\circ$
  5. $90^\circ$