Can i please get some help because i don’t quite remember everything

Aregular polygon has angkes of size 150° each.how many side has the polygon

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

What is the measurement of how fast an object moves relative to a reference point?