@@Matthias Apsel
Weil der Gunnar offensichtlich diesen Thread vergessen hat, poste ich jetzt mal meine Lösung.
Stimmt, da war ja noch was. Meine Lösung war so ähnlich. Nur dass der Radius des großen Kreises o.B.d.A. 1 ist und nicht als Variable auftaucht.
Radius der kleinen Kreise sei r, Radius der Halbkreise R.
Entlang der x-Achse sehen wir R + 2r = 1; r = ½ − ½R.
Der Punkt P muss die Kreisgleichung erfüllen: 1 = R² + (R + r)² = R² + (½R + ½)².
Das ergibt die quadratische Gleichung 0 = R² + ⅖R − ⅗, Lösung R = ⅗ (negative Lösung entfällt); r = ⅕.
Das gesuchte Verhältnis ist (3r² + R²) : 1 = ¹²⁄₂₅.
😷 LLAP
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“When I was 5 years old, my mother always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down ‘happy.’ They told me I didn’t understand the assignment, and I told them they didn’t understand life.” —John Lennon
“When I was 5 years old, my mother always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down ‘happy.’ They told me I didn’t understand the assignment, and I told them they didn’t understand life.” —John Lennon