№1
1) АВ=√((5-10)²+(2-14)²=√((-5)²+(-12)²)= √(25+144) = √169=13
2) АВ= √((4-(-1))²+(-3-2)² )= √(25+25) = 5√2
№2
1) CD= √((4+2)²+(-12+4)²)=√(36+64)= √100=10
2) CD=√((7-6)²+(-1-3)²)= √(1+16)= √17
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Answers & Comments
№1
1) АВ=√((5-10)²+(2-14)²=√((-5)²+(-12)²)= √(25+144) = √169=13
2) АВ= √((4-(-1))²+(-3-2)² )= √(25+25) = 5√2
№2
1) CD= √((4+2)²+(-12+4)²)=√(36+64)= √100=10
2) CD=√((7-6)²+(-1-3)²)= √(1+16)= √17