Answer:
Explanation:
A=(0,2), B=(-1,2), C=(-6,4)
AB²=(-1-0)²+(2-2)²=1 ==> AB=1
BC²=(-6+1)²+(4-2)²=25+4=29 ==> BC=√29
AC²=(-6-0)²+(4-2)²=36+4=40 ==> AC=√40
AB+BC+CA=1+√29+2√10≈12,7097
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