geometry

What is the perimeter of PQR with vertices P(–2, 9), Q(7, –3), and R(–2, –3) in the coordinate plane?

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  1. Use your distance between 2 points formula to find the 3 sides, then add them up

    I will do one of them
    PQ = √( 7-(-2))^2 + (-3-9)^2 )
    = √(81 + 144) = √225 = 15

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