Odpowiedzi

2009-11-16T13:17:07+01:00
Α = ∢DAB
tg 45° = 1
tg α = |DE|/|AE|

|DE = |AE|
|AE| = 9cm

|EB| = |AB| - 9cm

108cm² = |AB| * 9cm
|AB| = 12cm
|EB| = 3cm

Odp: Odcinek |EB| wynosi 3cm.
4 3 4