Odpowiedzi

2009-11-28T21:06:33+01:00
A(2,4)
B(-2,6)
C (-2,2)

AB = [-4,2]
AC = [-4,-2]
BC = [0,-4]

|AB| = √(-4)²+2²
|AB| = √16+4
|AB| = √20 = 2√5

|AC| = √(-4)²+(-2)²
|AC|= √16+4
|AC|= √20 = 2√5


|BC| = √0²+(-4)²
|BC| = √16
|BC| = 4

obw. = 2√5+2√5+4=4√5+4
1 4 1