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3 of a kind

A poker hand containing 3 cards of the same rank. Examples include 3 Aces, 3 Queens, 3 fives3 point equation

The equation of a parabola passing through 3 two-dimensional points3 unknowns

A set of 3 equations with 3 unknown variables3-dimensional points

Any three-dimensional point. Points located in R30-60-90 triangle^{3}. Example: (x, y, z)

A right triangle with another angle measuring 30 degrees, and the last angle measuring 60 degrees.