Question

5. Calcule o perímetro do triângulo ABC, sendo A(1, 4), B(-3, 7) e C(-3, 4). * 2 pontos a) 13 b) 12 c) 15 d) 10 e) 11

Answer 1

AB² = ( 1 + 3 )² + ( 4 - 7 )²

AB² = 16 + 9

AB² = 25

AB = 5

AC² = ( 1 + 3 )² + ( 4 - 4 )²

AC² = 16

AC = 4

BC² = ( - 3 + 3 )² + ( 7 - 4 )²

BC² = 9

BC = 3

AB + AC + BC =

5 + 4 + 3 =

12

---------------------------- > b