How Do You Estimate the Physical Dimensions of a 65-Inch Television?

Determining the dimensions of a 65-inch television requires knowing whether it is an SDTV or an HDTV. An SDTV has an aspect ratio of 4:3, yielding a 52-by-39-inch screen. An HDTV's aspect ratio is 16:9, providing a screen size of 56.55 by 31.85 inches.