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

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I have to attribute this solution to my dad. I showed him this problem and he recalled a method I used to solve another problem which I had showed him and how it could be applied here. (Remember the circle with the four 20 degree inscirbed angles? Thats the one)
Here's a new one for you maths brains to puzzle over Though I'm sure it's not TOO difficult. 