Answer:
27.6°
Step-by-step explanation:
Drop a Perpendicular from C to AD, call the foot X
CXD is a right angle triangle
CX = 6 cm
XD = 23 - 9 - [sqrt(6.5² - 6²)]
XD = 11.5
Tan(Angle CDA) = CX/XD = 6/11.5
Angle CDA = 27.55281158
