Odpowiedzi

2010-03-02T18:57:19+01:00
A) A=(1,4) B=(5,6)
|AB| = √(x₂-x₁)²+(y₂-y₁)² = √(5-1)²+(6-4)² = √4²+2² = √16+4 = √20 = 2√5

b) A=(-3,2) B=(-7,-1)
|AB| = √(x₂-x₁)²+(y₂-y₁)² = √(-7+3)²+(-1-2)² = √-4²+(-3)² = √16+9 = √25 = 5

c) A=(-5,-9) B=(1, -3)
|AB| = √(x₂-x₁)²+(y₂-y₁)² = √(1+5)²+(-3-9)² = √6²+(-12)² = √36+144 = √180
6 3 6