HCG seems to be a case of "you either get it or you dont"; my teacher has suggested that more practice = improvement, but this doesn't seem to be effective. Is there a more effective way to improve in HCG? Any particular textbooks which cover it well? Thanks.
for circle geo, you must remember all the rules and stuff ( tangents meet the radius at 90) ect. the more questions that you do, the more ways you will be able to notify and realise the steps required in doing the question. like every other subject, all the questions have already been asked, so the more you do, the more likely that a test is going to have a circle geo question that you know how to do.
if stuck, go through all of the 15-17 rules and see if you can apply any of them to the question. draw them on your diagram and hopefull you will see what you need to do. if ur still unsure, take a step into the unknown. i.e. just take a lead and follow it and you just might see a solution. Also, say the question asked prove that this angle and this other one are equal, write down or think about possible ways that will allow you to prove it. eg, " this angle will equal that angle if these two lines are parallel => prove they are parallel and then presto. just keep trying to think of the different possibilities that will allow you to prove the statement. the "thinking" can be removed by doing more and more questions....
hope that helps!