Question

Please answer it fast. It's urgent

Answer 1

Answer:

Step-by-step explanation:

i) In triangle ABD and ACD, we have:

  AB=AC ( Given )

  BD=DC ( Given )

  AD=DA ( Common )

Hence Triangle ABD is congruent to Triangle ACD by SSS Criteria.

ii) Let's consider angle BDC = 180 degree

   Angle ADB + Angle ADC = 180 degree

Hence, Angle ADB = Angle ADC = 90 degree.

iii) Angle B = Angle C, by CPCT of Congruent triangles.

iv) AD is the perpendicular bisector of BC, Thus it also bisects Angle A.

Hence, Angle BAD = Angle CAD. Also by CPCT..