Verified answer

2.3

r=3-10=-7     |r|=7

2.4    s=2+1=3     r=2-1=1     s/r=3/1=3

2.5    r=√((x2-x1)²+(y2-y1)²)=√((7-3)²+(5-4)²)=√17=4.12

α=arctg(1/4)=14°

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