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∢EBA = 30°
tg 30 = 2/|EB|
√3/3 =2/|EB|
2√3=|EB|
∢ADE = 60°
tg 60= |2/|DE|
√3=2/|DE|
|DE| = 2/√3 = 2√3/3
Dlugosc przekątnej to 8√3/3