Sails

We known heights 220, 165, and 132 of sail. It has a triangular shape. What is the surface of the sail?

Correct answer:

T =  18150

Step-by-step explanation:

$$\begin{gathered} h={\displaystyle \frac{1\mathrm{/}220+1\mathrm{/}165+1\mathrm{/}132}{2}}=0.0091 \\ T={\displaystyle \frac{1}{4\cdot \sqrt{h(h-1\mathrm{/}220)(h-1\mathrm{/}165)(h-1\mathrm{/}132)}}}=18150 \end{gathered}$$

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