Which version of iPad?
There are leads available to convert the connector on the iPad to either VGA or HDMI, though I think HDMI is only available on iPads with a Lightening connector. VGA is available in both 30 pin and Lightening connector formats.
You would also need an appropriate lead and matching connection on the TV.
Another option might be Apple TV and AirPlay. Apple TV is a small device that plugs into the TV and allows you to stream stuff from the iPad. AirPlay is an app you run on the iPad to make this happen.