Question 955093
Find the slopes.
{{{m[1]=(2-1)/(-10-10)=-1/20}}}
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{{{m[2]=(3-(-9))/(-6-10)=12/(-16)=-(3/4)}}}
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Perpendicular lines have slopes that are negative reciprocals,
{{{-(1/20)*(-(3/4))<> -1}}}
No, these lines are not perpendicular.