Final answer:
To find the direction of the vector sum, use the graphical method of vector addition and measure the angle between the positive x-axis and the line connecting the tail of vector c to its head.
Step-by-step explanation:
To find the direction of the vector sum of vector c and vector d, we can use the graphical method of vector addition. First, we draw vector c and vector d tail-to-head. Then, we draw the resultant vector from the tail of vector c to the head of vector d. The direction of the resultant vector is the direction from the tail of vector c to its head. We can measure this angle using a protractor.
For vector c, we have a length of 6.28m and a direction of 105°. For vector d, we have a length of 3.09m and a direction of 233°. The resultant vector is drawn from the tail of vector c to the head of vector d, and its direction can be measured as the angle between the positive x-axis and the line connecting the tail of vector c to its head.
Using a protractor, we can measure this angle to find the direction of the vector sum of vector c and vector d.