Lecture 6.2. Wherein rigid body rotations are considered from a geometric point-of-view. Basic properties of what to expect from the algebra, such as non-commutativity, are explored. Roll, pitch, and yaw. This lecture was recorded at Saint Martin's University in the Spring 2021 term as part of the course lrpk (see the course website http://ricopic.one/courses/robotics-p.... It is the property of the instructor Dr. Rico Picone.