![]() ![]() ![]() ![]() When an object has the same number of reflection symmetries as rotation symmetries, we say it has symmetry type Therefore, the pentagon has symmetry type because it has five reflection symmetries and five rotation symmetries. Id also be interested to know how much of this 'Physics 101' treatment of rigid body motion preceded the more sophisticated description of rigid body mechanics with Euler equations, moment of inertia tensor, etc. This is called a rigid motion M it assigns to every point p of the figure concerned a new point Mp such that, for all p and q, p(Mp, Mq) p(p,q) (5) put. ![]()
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