Question 493223
We can use the distance formula to find the distance of each point.
{{{sqrt((x2 - x1)^2 + (y2 - y1)^2 )}}}
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PQ = {{{sqrt((1 - -6)^2 + (-1 - -3)^2 )}}}
PQ = {{{sqrt((7)^2 + (2)^2 )}}}
PQ = {{{sqrt(49 + 4 )}}}
PQ ={{{sqrt(53 )}}}
PQ = 7.3
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QR = {{{sqrt((1 -1)^2 + (-5 - -1)^2 )}}}
QR = {{{sqrt((0)^2 + (-4)^2 )}}}
QR = {{{sqrt(16 )}}}
QR = 4
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PR = {{{sqrt((1 --6)^2 + (-5 --3)^2 )}}}
PR = {{{sqrt((7)^2 + (-2)^2 )}}}
PR ={{{sqrt(53 )}}}
PR = 7.3
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7-3 + 4 + 7.3 = 18.6, this is our perimeter.
Cleomenius.