Question

The figure below shows a quadrilateral ABCD with diagonal BD bisecting angle ADC:




Angle ABD = angle BCD

Angle DCB = angle ADB

Angle ABD = angle CBD

Angle ABD = angle CDB

Answer 1

Which angles are congruent, do you think? @booskibabe17

Answer 2

BD bisects angle ADC: means it divides this angle into two identical angles.

i.e
\[\angle BDA = \angle BDC\]