Question

In a traingle Abc , angle a = 78 degree , Ad bisects angle a and Ad _| Bc , then Angle b is equal to

its urgent
please ​

Answer 1

Answer:

25°

Step-by-step explanation:

As,

∠BAD = 39°

and

∠ADB = 90°             [As perpendicular to BC]

Therefore by angle sum property

∠BAD + ∠ADB + ∠DBA = 180°

39°+ 90° + ∠DBA = 180°

∠DBA = 25°