the following triangle ABC is rotated clockwise about the origin the new coordinates are A'(1,-2) B'(4,6) and C'(-2,3). Which of the following is measured of the angle of rotation?Original Angles A(2,1) B(-6,4) C(-3,-2)A. 45 degreesB. 90 degreesC. 180 degreesD. 270 degrees
Accepted Solution
A:
B.90 because 90 degrees is above the original angel