Question

Calcule o perímetro do triângulo ABC, sendo dados A(2,1), B(-1,3) e C(4,-2)

Answer 1

Boa tarde

triangle 
A(2, 1),
B(-1, 3),
C(4, -2)     

AB² = 3² + 2² = 9 + 4 = 13
AB = √13

BC²  = 5²  + 5² = 50
BC = 5√2

AC² = 2² + 3² = 4 + 9 = 13
AC = √13

P = AB + BC + AC
P = √13 + 5√2 + √13 
P = 2√13 + 5√2 = 14.2822

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