Base on my calculation and also by the sue of the data you give where as the triangle ABC is rotated by 100 counter clockwise about point P to create triangle A'B'C' the possible value of angle C'A'B is 70 degrees. I hope you are satisfied with my answer and feel free to ask for more
For this case what you should know is that the vector ab will be given by: ab = b-a We have then: ab = (3, 5) - (- 2, 4) ab = ((3 - (- 2)), (5-4)) ab = (5, 1) Equivalently the vector is: ab = 5i + 1j Answer: ab = 5i + 1j
