Question

The figure below shows Quadrilateral CDBE inscribed in a circle with center A.


The paragraph proof with missing statement proves that its opposite angles are supplementary. Which statement can be used to fill in the blank space?

Given that CDBE is a quadrilateral inscribed in a circle with center A, ∡DCE and ∡DBE are inscribed angles. Since the measure of an inscribed angle is one-half the measure of its intercepted arc, ∡DCE is half of arc DBE and __________________________________

Answer 1

∡CBE is half of arc DCE

∡EDC is half of arc ECD

∡DCE is half of arc DBE

∡DBE is half of arc DCE

Answer 2

Last one

Answer 3

thanks @Syderitic