Question

Does anyone know the answer?

Answer 1

12.7

Explanation:

12.7

Basically u are gonna wanna use pythagoras first

BC = √(12^2 - 6^2) = √(144 - 36) = √(108) = 10.39230485

Also the Side Angle Side rule comes into play use the following

BC/sin(55) = CD/sin(90) <----- angle

BC/sin(55) = CD/sin(90)

sin(90)BC/sin(55) = CD

1*BC/sin(55) = CD

BC/sin(55) = CD

10.39230485/0.819152044 = CD

12.68666167 = CD

12.7 = CD

Answer 2

BC=√+(12)^2-(6)^2))

=10.39

sin55=10.39/CD

CD=12.7