Alguien me ayuda con esto por favor...Lo suplico

In the final round of trivia competition, contestants were asked to name as many states that begin with the letter m as they could in 15 seconds. the bar graph shows the number of states the contestants were able to name. how many contestants participated in the final round of the competition?

Give all possible names for the line shown.calculation tip: lines can be written with either point first.

Select the lengths in centimeters that would form a right triangle