180/4 = 45
45 x 3 = 135
answer: <span>The measure of the larger angle is 135 (last choice)</span>
The best way to randomly choose the 100 families would be to allow a random number generator to come up with 100 families within a 50 radius of the amusement park.
Using this method would ensure that it is more randomised & not limited to people who come at a specific time or are in a specific area as well as it not be affected by subconscious bias of people when selecting people to survey.
246/1000 or 123/500 hope this helps