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VTMO 2020 — Grade 8 — vtmo Question 3

VTMO · VTMO 2020 — Grade 8 — vtmo

Question 3

Triangle side lengths are selected from $\{ 4 , 5 , 6 , 7 , 8 \}$, allowing repetitions. How many obtuse triangles are there?
  1. $4$
  2. $5$
  3. $6$
  4. $7$
  5. $8$