guys pasagot naman po oh please please please please please please kailangan na kailangan ko na po may 5 ko na po ipapasa please please

Answer:
1. 20 cm
2. 8 cm
3. 90 degrees
4. 45 degrees
Step-by-step explanation:
1. Line AB is congruent to line AC.
2. Line BD is half of line BC.
3. Angle ADB is a right angle.
4. Angle B is congruent to angle C.