Odpowiedzi

2009-05-06T15:54:32+02:00
A) |CE|/|CB| = |DC|/|CA| => 1/2 = |DC|/19 => |DC|=6i1/2 (cm)
b) |CB|/|AB| = |CE|/|DE|
{|CB|=|EB|+3}
wiec z powyzszych:
(|EB|+3)/7 = 3/1 => |EB| +3 = 21 => |EB| = 18 (dm)