Tagged: geometry
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70 degrees. Using sine and cosine law of triangles, and standard trigonometric identities.
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Yeah, trigonometry works well for this problem. Try to find the “pretty” solution now though:)
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Wow, I have never seen this solution before, good job! There are (at least) 2 other solutions involving equilateral triangles:)
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Before your “pretty solution -clue”, I got that through lots of equations , changing 1/2 to sin 30 and the like. haha..This is cool! 🙂
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