[" In "Delta+1BC,uarr D" is the bisector of "/_BAC" ,meeting "BC" at "" D.If "fC=21cm," ,"],[BC=12" cm and the length of "BD" is "2cm" less than "DC" ,then the length of "],[" side "fl" B is: "]

In triangle ABC ,AD is the bisector of angle BAC , meeting BC at D. If AC= 21 cm, BC = 12 cm and the length BD is 2 cm less than DC, then the length of side AB is : त्रिभुज ABC में, AD, angle BAC का द्विभाजक है जो BC से D पर मिलता है| यदि AC =21 सेमी, BC =12 सेमी है और BD की लंबाईDC से 2 सेमी कम है, तो भुजा AB की लंबाई ज्ञात करें |

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