Skip to content / Đến nội dung
ThichHocToan.com

TIMO 2021 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 1 Question 19

TIMO · TIMO 2021 - Senior Secondary (Grades 10-12) - Preliminary Round - Paper 1

Question 19

How many diagonals does a convex 20-gon have?
  1. 360
  2. 190
  3. 340
  4. 170