Question

In triangle ABC, if angle A = 100 degree,
AD bisects angle A, and AD perpendicular
to BC, Then angle B is.​

Answer 1

Answer:

Angle b = 40 degree

Step-by-step explanation:

First we need to prove the triangles congruent,

Such that angle b = angle c

Answer 2

Answer:

40

Step-by-step explanation:

sine ad bisects angle a then the angles dac and dab =50 degrees

since ad is perpendicular to bc then the 2 angles are 90

therefore in triangle adb by angle sum prop

angle b = 180 - (90 +50)

=40

plz mark brainlyest

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