Hypotenuse by Pythagoras theorem = 407.83.
300 - 30 3/10 = 269 7/10
hope this helps
I do not have your choices but all the statements that I can think of is the following: A point in the x,y form has two dimensions, a plane has a definite beginning and end, the line has one dimension or length, and finally a point consists of an infinite set of the lines <span />