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Isosceles triangle

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Calculates the values of the other elements of an isosceles triangle based on two selected input values.
\( b=\sqrt{h^2+ {\Large\frac{a^2}{4}}} \hspace{20px} \theta=tan^{\small -1}{\Large(\frac{2h}{a})} \hspace{20px} S={\Large\frac{1}{2}}ah \\\\\)
Input Specifications
Base a
Height h
\(\normalsize Isosceles\ triangle\\ (1)\ height:\hspace{50px} h={\large\frac{a}{2}}tan\theta=b\cdot sin\theta\\ (2)\ base\ length:\hspace{10px} a=2b\cdot cos\theta\\ (3)\ area:\hspace{60px}S={\large\frac{1}{2}}ah={\large\frac{1}{2}}b^2sin2\theta\\ \)

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