Answer:
(C) 90°
Step-by-step explanation:
The computation of the angle b is as followS:
Given that,
AB = 6√3 cm,
AC = 12 cm,
And BC = 6 cm
Now squaring all the above ones
AB^2 = 108
AC^2 = 144
And, BC62 = 36
AB^2 + BC^2 = AC^2
It shows the Pythagoras theorem.
Therefore the angle B is a right triangle i.e. 90 degrees
Hence, the correct option is C.
