Answer:
The length of the missing side can be calculated by the following steps;
Step-by-step explanation:
81 is the correct answer
hope it helps you have a good day
im on the same one if i get it right i will comment and tell u k?
kk
3rd option
the ratio of b : c is the cos77° , that is
cos77° = = ≈ 0.224951054.
its c .i just took it