Hi, I have this really annoying problem in Geometry..

There's this triangle:

Data:

BD is perpendicular to AC(Both sides of <D form 90 degrees)

ABC is a right triangle, <B=90

<A = alpha

The question is:

Express using alpha the following angles:

1. <C

2. <DBC

3. <DBA

For example is alpha was <C + <C then you'd express using alpha the angle <C by writing <C = 1/2alpha

This should be solved using very basic right triangle rules, but I don't know what to do.

I need this for tomorrow's homework =/

Thanks to all helpers