Question

in the given figure prove that: ∆ABC congruent to ∆ADC​

Answer 1

Answer:

in abc and adc

ab=dc ( given)

bc=cd ( given)

ac ( common side)

so abc congruent to adc ( S.S.S crieterion)

Answer 2

∆A+B+C= 180

∆A+D+C=180

∆BD=360

360-180=180°