Here are some picture to help home owners measure their own siding.
This is a picture of a hip roof and a gable roof. To figure siding on the gable roof measure the length and the height and multiply by .7
This is a picture of covered eaves or soffit, usually covered with painted plywood.
This is a picture of open eaves or soffit.
Two story with walk out with a framed basement wall with siding on it.
The soffit areas with gutter on them are the gutter runs.
There are no overhangs on this house, just fascia only.