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/suÂ·piÂ·naÂ·tion/ (sooâ³pÄ­-naÂ´shun) [L. supinatio ] the act of assuming the supine position, or the state of being supine. Applied to the hand, the act of turning the palm forward (anteriorly) or upward, performed by lateral rotation of the forearm. Applied to the foot, it generally implies movements resulting in raising of the medial margin of the foot, hence of the longitudinal arch.
Then - if the parabola opens upward - you can assume that the lowest point of the triangle is at the vertex; write an equation â¦for each of the lines in the equilateral triangle. These lines will slope upwards (or downwards) at an angle of 60Â°; you must convert that to a slope (using the tangent function).