The figure below shows a quadrilateral ABCD with diagonal BD bisecting angle ADC.
Which Equation is true?
angle DCB = angle ADB

angle DAB = angle DCB

angle ABD = angle BCD

angle ABD = angle CDB

Question

The figure below shows a quadrilateral ABCD with diagonal BD bisecting angle ADC. 
Which Equation is true? 
angle DCB = angle ADB 

angle DAB = angle DCB 

angle ABD = angle BCD 

angle ABD = angle CDB

anonymous · Answer

attachment

anonymous · Answer

so the non-vertex angles are congruent, Answer:
angle DAB = angle DCB

anonymous · Answer

Can you explain how you got there?

anonymous · Answer

The non-vertex angles are congruent

anonymous · Answer

if two sides and the included angle of a triangle are congruent to the corresponding sides and angle of another triangle , then the triangles are congruent by SAS postulate