Respostas

2014-03-27T00:07:33-03:00
D = √(xa - xb)² + (ya - yb)²

d = √(10-22)² + (15-10)²
d = √144 + 25
d = √169
d = 13

d = √(-1-3)² + (4-2)² 
d = √16+4
d = √20

d = √(5-9)² + (7-4)²
d = √16 + 9
d = √25
d = 5

d = √(-1-(-1))² + (3-1)²
d = √4
d = 2
1 4 1