Question

find angle ACB reflex angle AOB = 210° where is the centre of the circle ​

Answer 1

Answer:

Step-by-step explanation:

First acb=150 degree

Answer 2

Answer:

Step-by-step explanation:

angle AOB=100

angle ACB=50 (angle made at centre is double the angle made at any other point)

now,ACBD is a cyclic quadrilateral , so angle ADB + angle ACB=180 ( sum of opposite angles of a cyclic quad. is 180)

therefore,angle ADB=180-50=130

ANSWER IS 130°