00:01
The rule for 90 degrees counterclockwise is opposite b, a, or maybe you've learned as negative y, x.
00:08
So if you plotted the original points, 0 ,1, negative 6, 0, and 3, negative 2, you can tell them where to go with this rule.
00:20
Opposite b, we'll say if this is points a, b, and c, then a prime will be at opposite b, which would be negative 1, a, which is 0.
00:31
B prime would be located at opposite b, where opposite 0 is 0, a, negative 6...