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2-3-1 Offense 2-3-1 Triangle Rotations. The most common offense used in settled situations is known as the "2-3-1" (sometimes counted in the opposite direction, as a 1-3-2, or shortened to be called the 1-3 or 13).
1914. Play 1st used by: Bristol high school. Country: United States. The 2–3 zone defense is a defensive strategy used in basketball as an alternative to man-to-man defense. It is referred to as the 2–3 because of its formation on the court, which consists of two players at the front of the defense (closer to half court) and three players ...
A box-and-one defense is usually used against teams with one dominant scoring threat. The idea is to try to shut that player down by forcing them to score against a dedicated man-to-man player, and a supporting zone. [1] Players such as Allen Iverson and Ray Allen often faced box-and-one defensive schemes while competing for Georgetown ...
The 2nd Infantry Division (2ID, 2nd ID) ("Indianhead") [ 1] is a formation of the United States Army. Since the 1960s, its current primary mission is the pre-emptive defense of South Korea in the event of an invasion from North Korea. There are approximately 17,000 soldiers in the 2nd Infantry Division, with 10,000 of them stationed in South ...
As the Earth has a sidereal rotation period of 23.93 hours, it has an angular velocity of 7.29 × 10 −5 rad·s −1. [2] The Earth has a moment of inertia, I = 8.04 × 10 37 kg·m 2. [3] Therefore, it has a rotational kinetic energy of 2.14 × 10 29 J. Part of the Earth's rotational energy can also be tapped using tidal power.
p ↦ q p for q = 1 + i + j + k / 2 on the unit 3-sphere. Note this one-sided (namely, left) multiplication yields a 60° rotation of quaternions. The length of is √ 3, the half angle is π / 3 (60°) with cosine 1 / 2 , (cos 60° = 0.5) and sine √ 3 / 2 , (sin 60° ≈ 0.866). We are therefore dealing with a ...
A rotation represented by an Euler axis and angle. In geometry, Euler's rotation theorem states that, in three-dimensional space, any displacement of a rigid body such that a point on the rigid body remains fixed, is equivalent to a single rotation about some axis that runs through the fixed point. It also means that the composition of two ...
In 2D and 3D every rotation is a planar rotation, and the trace is a function of the angle alone. For a 2D rotation, the trace is 2 cos θ; for a 3D rotation, 1 + 2 cos θ. Examples. Consider a 60° (6-fold) rotation matrix with respect to an orthonormal basis in 2D.