Question

In a triangle right angled at B, AB = 12 cm, AC = 15 cm, then BC = ? *

Answer 1

9 cm is the ans .

Step-by-step explanation:

simply use pythgoras theorem

AC²= AB²+BC² frm here find BC

u will get BC = ±9 cm u will reject -9 bcoz length cant b in negative hence , BC = 9cm

Answer 2

Answer:

BC=9

Step-by-step explanation:

ac^2=ab^2+bc^2

(15)^2 =(12)^2+bc^2

bc^2= (15^2)-(12^2)

bc^2 = 225-144

bc^2=81

bc=√81

bc=9