Width of the reflective surface (${L}_{e}$):

Distance from upper line to focal point (${I}_{\mathrm{up}}$):

Thickness of the back plate (${T}_{b}$):

Value step:

Bearing radius ($\frac{1}{2}}{D}_{o$):

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Description: determining the design parameters of small closed parabolic troughs interactive exercises, online calculators and plotters, mathematical recreation and games

Keywords: interactive mathematics, interactive math, server side interactivity, engineering, geometry, engineering, parabolic trough, parabola