Question

In triangle ABC if AD is perpendicular to BC then prove that angle BAC=90

Answer 1

in BAD, angle D is 90 then angle A&B are 45 degree
in CAD, angle D is 90,then angle A&C r 45 degree
so angle BAD & CAD IS 45 degree
so 45+45=90degree
that is angle BAC is 90

Answer 2

Answer:

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