Предмет: Математика, автор: annatiedeman

Математика 9-10 кл треугольники 20 баллов

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Ответы

Автор ответа: yurayaniv

Ответ: 56 cm

Пошаговое объяснение:

P=AB+BC+AC

P=x+((x-6)+12)+20

За властивістю бісектриси:

BP/PC=AB/AC

(x-6)/12=x/20;

20(x-6)=12x;

20x-120=12x;

8x=120;

x=15(cm);

P=15+((15-6)+12)+20=56(cm)

annatiedeman: spasibo ogromnoe

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