# Area 4gon

Calculate area of 4-gon, two and the two sides are equal and parallel with lengths 11, 5, 11 and 5. Inner angles are 45°, 135°,45°, 135°.

Correct result:

A =  38.89

#### Solution:

$A=a{v}_{a}=11\cdot \frac{5}{\sqrt{2}}=38.89$

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