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五芒星の角度 (TANTON 数学)
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5 点の星または五角形をレイアウトする方法 - 数学を使わない幾何学 - WOOD マガジン
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5ポイントスターの作り方3 角度を設定する
5 Minute Stars - Q&A - Bonus 45 Degree Stars
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ウッドスターの作り方を60秒以内で紹介
Texas Stars, How To Cut The Angles!!! (Part 2)
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521 Math #17: angles in a 10-point STAR (solved within 30 seconds)
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留め鋸で鋭角にカットする方法
find sum of angles in a star shape. Split shape up into 5 triangles and a pentagon
How to Make a Star With 45 Degree Angles
Draw five pointed star
The sum of angles of a 5-pointed star | plane geometry | intermediate level