Question

how many degrees did the arrow turn?

Explanation:

Step1: Identify the angle type

The diagram shows a right angle (marked by the square corner) between the north - south line and the east - west line. A right angle is defined as an angle of 90 degrees.

Step2: Determine the turn angle

The arrow (from the west - pointing direction to the north - pointing direction or vice - versa, based on the turn) is turning through this right - angled region. So the number of degrees the arrow turned is equal to the measure of a right angle.

Answer:

90