Question

ABCD is a cyclic quadrilateral and AB=AD, if angle ADB-70°, then find the

value of angle BCD​

Answer 1

Answer:

Draw the figure for urself to have a better explanation.

$So, \\AB=AD\\Or, angle ADB= angle ABD$

Or, ∠ABD=∠ADB=70°

Or, in triangle ABD ∠A= $180-(70+70)= 40$

Or, because it is  a cyclic quad. ∴ ∠BCD$=180- angle A= 180-40= 140$

Step-by-step explanation: