# 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°.

Result

A =  38.89

#### Solution:

$A= a v_a = 11 \cdot \dfrac{ 5 } { \sqrt2 } = 38.89$

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