Ответ:
АВ= (6-1;-7-5)=(5;-12)
|АВ|=√(6-1)^2+(-7-5)^2=√25+144=√169=13
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Ответ:
АВ= (6-1;-7-5)=(5;-12)
|АВ|=√(6-1)^2+(-7-5)^2=√25+144=√169=13