Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**tony123****Member**- Registered: 2007-08-03
- Posts: 189

In acute triangle ABC with circumcenter O and altitude AP, angle C

is greater than or equal to angle B plus 30 degrees. Prove that angle A

plus angle COP is less than 90 degrees.

*Last edited by tony123 (2008-07-08 09:57:47)*

Offline

Pages: **1**