Question

converse of cyclic quadrilateral

Please I am studying right now and I am in doubt I ll mark you the brainliewt

Here Angle CDA is an extrior angle
but they took
angle CD'A=D'CD+CDD'

I just wanna know why D'CD+CDD'​

Answer 1

Answer:

Converse of cyclic quadrilateral theorem Theorem : If a pair of opposite angles of a. quadrilateral is supplementary, the quadrilateral is cyclic