Ola Erica
AB² = (Ax - Bx)² + (Ay - By)²
AB² = (-6 + 2)² + (5 + 4)² = 16 + 81 = 97
AB = √97
BC² = (Bx - Cx)² + (By - Cy)²
BC² = (-2 + 5)² + (-4 - 1)² = 9 + 25 = 34
BC = √34
AC² = (Ax - Cx)² + (Ay - Cy)²
AC² = (-6 + 5)² + (5 - 1)² = 1 + 16 = 17
AC = √17
perímetro
P = √97 + √34 + √17 = 19.8
gráfico
http://www.wolframalpha.com/input/?i=triangle+A+%2...
pronto
Alguem sabe fazer?
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Answers & Comments
Ola Erica
AB² = (Ax - Bx)² + (Ay - By)²
AB² = (-6 + 2)² + (5 + 4)² = 16 + 81 = 97
AB = √97
BC² = (Bx - Cx)² + (By - Cy)²
BC² = (-2 + 5)² + (-4 - 1)² = 9 + 25 = 34
BC = √34
AC² = (Ax - Cx)² + (Ay - Cy)²
AC² = (-6 + 5)² + (5 - 1)² = 1 + 16 = 17
AC = √17
perímetro
P = √97 + √34 + √17 = 19.8
gráfico
http://www.wolframalpha.com/input/?i=triangle+A+%2...
pronto
Alguem sabe fazer?