Question

In triangle ABC angleB= 90° BD is perpendicular to AC ,AB=8cm,BD=4cm then find length of c

Answer 1

If it is perpendicular so there are two things-

1) angle d is 90°

2)angle b is half=45°

Angle b+angle d+ angle c=180°

45°+90°+angle c=180°

135°+angle c=180°

Angle c=180°-135°

=45°