Question 647869


PQR with vertices P(–2, 9), Q(7, –3), and R(–2, –3) 

first distance P(–2, 9), Q(7, –3)

*[invoke Distance_Formula_for_Coordinate_Plane -2, 9, 7, -3]

so, {{{PQ=15}}}....one side of PQR



second distance P(–2, 9), R(–2, –3) 

*[invoke Distance_Formula_for_Coordinate_Plane -2, 9, -2, -3]

{{{PR=12}}}....second  side of PQR



third distance Q(7, –3), R(–2, –3) 

*[invoke Distance_Formula_for_Coordinate_Plane 7, -3, -2, -3]

{{{QR=9}}}....third  side of PQR


now you are ready to find the perimeter {{{P=PQ+PR+QR}}}

{{{P=15+12+9}}}

{{{P=36}}}