You will find the Charts on the Insert Menu when you tap the +(Add) icon.

The Charts include bar and column charts, percentage ring and pie charts. These are interactive charts that you manipulate directly on the page by dragging the various control handles. Hover over a handle to see a tool tip description.

Here's a bar chart...

The charts are all based on Theme Color 1, (they just appear blue in the  picker) so when placed in your document they will match whatever your Theme Color 1 is.

Here's a percentage ring... 

Take a look at this tutorial for info on pie charts:

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