No disrespect was intended, but consider things from the helper's point of view. When someone posts a problem, the helper knows nothing about the OP's background or educational history unless the OP chooses to share. Oftentimes, an OP is trying to self-teach a subject and may not have covered subjects in his self-study which would normally have been encountered in school. The lack of adequate academic grounding may contribute to all or part of the difficulty the OP has with solving a particular problem.
Now, in your case, since you have been out of school for an extended period and are trying to reenter academic study, a fairly extensive refresher course of study may be required. For the subjects of geometry and trigonometry, there are many sites online which can provide the basics or more advanced study in these and other areas of mathematics. I have found the math articles in Wikipedia to give a concentrated treatment of their subjects. By searching the web for other math sites, you will undoubtedly find others which may give you the right level of help.
Paul's Online Math Notes has good articles for algebra, trig, and calculus, but is noticeably lacking in covering topics in plane geometry. TheMathPage I think can make up for what Paul's lacks in basic math.
HTH.
