Final answer:
The correct side lengths for a widescreen TV with a 16:9 aspect ratio are Width (a): 16 units, and Height (b): 9 units, which is option A.
Step-by-step explanation:
To determine the side lengths of a widescreen TV with an aspect ratio of 16:9 for the width and height, we want to find the option that correctly represents this ratio. An aspect ratio describes the ratio of width to height, or in other words, for every 16 units of width, there would be 9 units of height.
The correct answer in this case would be:
A) Width (a): 16 units, Height (b): 9 units
This answer is the direct representation of the given aspect ratio with the width being 16 units and the height 9 units.