how can I take a list of genes involved in angiogenesis in human?
The guys already mentioned methods how to get the genes associated with a pathway. In addition, if you want to find out more about a pathway in general, you could have a look e.g. at reactome or wikipathways
Since there is a GO term for angiogenesis (GO:0001525), you could just go to http://geneontology.org and retrieve the list of human genes associated with that GO term.
A: focus on specific pathway
A: How to look up GO terms associated to a certain organism?