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Parabolic Segment

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Calculates the area and arc length of a segment of a parabola.
Height a
Chord length b
Area S 
Arc Length L 
\(\normalsize Parabolic arch\\ (1)\ area:\hspace{65px} S= {\large\frac{2}{3}}ab\\ (2)\ circular\ arc:\ L={\large\frac{1}{2}}s+{\large\frac{b^2}{8a}}\ln({\large\frac{4a+s}{b}})\\ \hspace{170px} s=\sqrt{b^2+16a^2}\\\)

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