Which one is it? Free p0ints! 3 PART Question!!

What situation is an example of an observational study

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab