There are a few ways to achieve this. One of the best ways is to download the results as charts.
To do this head over to the report view of any poll and navigate to the 'Questions' tab. From here, on the toolbar you should see the option for 'Chart View'. After clicking this all your questions should be displayed in chart format, and a new option will appear that allows you to download all the charts as images.
Alternatively you can scroll down the page and download these individually, if you only wanted to select a few. By doing this you can also perform some small customisations - like selecting either a bar chart or a pie chart. There is a selection of buttons beneath each chart where you can do this.
Also the 'presenter screen' which can be found towards the top of this same screen labeled - 'Presenter'. This is normally used to present at live events and displays the results of your poll for an audience. The chart functionality is more for when you want to integrate the results into an existing presentation.