Question

Find the length of the hypotenuse of the right angled triangle ABC = where AB =3m ,BC =4m and B=90°

Answer 1

AC^2 = ab^2 + bc^2
             =    3^2 + 4^2
           =   9+ 16
ac^2=25
ac=5

Answer 2

AC=square root of(3)^2+(4)^2
=square root of 9+16
=sq root of 25
=5