Question

please give step by step ans​

Answer 1

Answer:

30 degree

Step-by-step explanation:

angle EDA = 260

angle ADE = 360 - 260= 100 degree

angle BDE = 40 degree

angle ADB = 100 - 40 = 60

angle ADC = 90 degree ( angle of a rectangle)

angle ADC = angle ADB + angle BDC

angle CDB = angle ADC - angle ADB

= 90 - 60 = 30 degree

angle CDB = 30 degree