# Sails

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

Correct result:

T =  18150

#### Solution:

$h = \dfrac{ 1/220 + 1/165 + 1/132}{2} = 0.0091 \ \\ T = \dfrac{1}{4\cdot \sqrt{ h(h - 1/220)(h - 1/165)(h - 1/132)}} = 18150$

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