Apolygon is a type of plane figure a square is a type of parallegram which is a special quadrilateral a quadrilateral is a four sided polygon a trapezoid is a type of quadrilateral using the sets definitions below which of the following statements about the sets given is true

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling