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tellans16

Биссектриса делит сторону треугольника на отрезки пропорциональные прилегающим сторонам:

CK/KE=CD/DE; 6/8=x/(28-x)

6*(28-x)=8*x; 168-6x=8x; 14x=168; x=12;  

CD=12 cm.

DE=28-12=16 cm.

CE=6+8=14 cm.

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