Which set of angles measures could be the three angles in a triangle A. 40 degrees,50 degrees,60 degrees
B 50 degrees,60 degrees,70 degree
C 60,70,80 degrees
D 70,80,90 degrees

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .