Question

ABCD is a cyclic quadrilateral such that t angle ADB=30 , then find angle ACB .

a 60

b 30

c 150

d 15​

Answer 1

Given: ABCD is a cyclic quadrilateral, ∠ADB = 30°

To Find: ∠ACB

Step-by-step explanation:

A cyclic quadrilateral is quadrilateral in which opposite angle add upto 180°

i.e., ∠ABC + ∠BCD = 180°, ∠CDA + ∠DAB = 180°

and

angle subtended by same chord are equal

i.e., ∠ADB = ∠ACB

      ∠ACB = 30°

Diagram is attached below.