Respuesta :

Shrishty

Using Pythagoras Theorem,

(AB)^2+ (AC)^2= (BC)^2

(9)^2+ (12)^2 = (BC)^2

81+144= (BC)^2

225= (BC)^2

BC= √225

BC= 15

Hope it helps you. Please mark brainliest.

lizh151
The answer would be b