How can I make bar & pie charts in angular js?

You can use

1. Angular chart (using Chart.js)
2. Angular charts using D3
3. Angular-nvD3
4. You can use Google Charts also. You can use it with AngularJS

I use data driven documents http://d3js.org/ there is also a good pluralsight course on getting started if you have a subscription.

http://www.pluralsight.com/courses/d3js-data-visualization-fundamentals