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|AD|²= 9+4
|AD|²=13
|AD|=√13
|AB|²= 2²+3²
|AB|=√13
|BC|²= 5²+1²
|BC|=√26
|CD|²=6²+4²
|CD|=√52=2√13
Obwód= 2√13+√26+√13+√13= 4√13+√26
Pole=[(√13+2√13)*√13]÷2= 19,5