Question

in triangle abc angle A equal to 45 degree and angle b equal to 25 degree find the exterior angle of b​

Answer 1

Step-by-step explanation:

∠A = 45°

∠B = 25°

∠C + ∠A + ∠B = 180° (Angle sum property)

∠C + 45° + 25° = 180°

∠C + 70°= 180°

∠C = 180° - 70°

∠C = 110°

Let exterior angle of ∠B be ∠D.

∠D = ∠A + ∠C (Exterior angle property)

∠D = 45° + 110°

∠D = 155°

ANSWER:  Exterior angle of ∠B is equal to 155°