АD=√ (ХА-ХD)²+(УА-УD)²=√(-2-3)²+(-3-2)²=√25+25=√50
ВC= √ (XB-XC)²+(YB-YC)²=√(4+1)²+(-1-4)²=√25+25=√50
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АD=√ (ХА-ХD)²+(УА-УD)²=√(-2-3)²+(-3-2)²=√25+25=√50
ВC= √ (XB-XC)²+(YB-YC)²=√(4+1)²+(-1-4)²=√25+25=√50