Question

ABCD is a cyclic quadrilateral if angle BCD 100 degree and angle ABD 70 degree find angle ADB

Answer 1

hlo

hope the attachment will help u

Answer 2

$\angle ADB$ = 30 Degree

Step-by-step explanation:

Given ABCD is Cyclic Quadrilateral

So, $\angle A + \angle C = 180$ (ABCD is Cyclic Quadrilateral)

$\angle A + 100 = 180$

$\angle A = 80$

Now, in ΔDAB,

$\angle DAB + \angle ABD + \angle ADB = 180$ (Angle Sum property of triangle)

80 + 70 + x = 180

x = 180 - 150

x = 30

$\angle ADB = 30$