Please solve question no 12 with proper explanation 

Asked by adityaahuja099 | 2nd Dec, 2017, 10:05: AM

Expert Answer:

begin mathsize 16px style AE space is space diameter
angle ACE equals 90 degree
angle ACD equals 60 degree
increment ABE approximately equal to increment ACE..... open parentheses AAS close parentheses
So space AC equals AB
in space increment ABC
AC equals AB
angle ACB equals 60 degree
angle ABC equals 60 degree..... iso increment
so
angle BAC equals 60 degree space end style

Answered by Arun | 2nd Dec, 2017, 03:37: PM