Mathematics, 28.01.2020 17:49 kennyg02
What is the perimeter of triangle pqr with vertices p(-2,9), q(7,-3), and r(-2,-3) in the coordinate plane?
Answers: 2
![\bf PQ=\sqrt{[7-(-2)]^2+[-3-9]^2}\implies PQ=\sqrt{(7+2)^2+(-3-9)^2} \\\\\\ PQ=\sqrt{81+144}\\\\ -------------------------------\\\\ QR=\sqrt{[-2-7]^2+[-3-(-3)]^2}\implies QR=\sqrt{(-9)^2+(-3+3)^2} \\\\\\ QR=\sqrt{81}\\\\](/tpl/images/0477/7516/5d9e5.png)
![\bf -------------------------------\\\\ RP=\sqrt{[-2-(-2)]^2+[9-(-3)]^2} \\\\\\ RP=\sqrt{(-2+2)^2+(9+3)^2}\implies RP=\sqrt{144}](/tpl/images/0477/7516/51cef.png)
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What is the perimeter of triangle pqr with vertices p(-2,9), q(7,-3), and r(-2,-3) in the coordinate...
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