RESOLUÇÃO - CAP 18 - 6AP (a, b), 9AP, 4AS

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 Área de um triângulo

4AS) Seja ABC um triângulo. Determine sua área, se as coordenadas dos vértices são A (2, 1), B (3, 2) e C (- 2, 5).

 Coordenadas do baricentro de um triângulo 𝑋𝐴 + 𝑋𝐵 + 𝑋𝐶 𝑌𝐴 + 𝑌𝐵 + 𝑌𝐶 𝐺 ( ; ) 3 3

9AP) Seja ABC um triângulo tal que A (1, 1), B (3, - 1) e C (5, 3). O ponto _____ é o baricentro desse triângulo. a) (2, 1) b) (3, 3) c) (1, 3) d) (3, 1)

 Divisão de um segmento por um ponto 𝑟=

⃗⃗⃗⃗⃗ 𝐴𝐶 𝑥𝐶 − 𝑥𝐴 𝑦𝐶 − 𝑦𝐴 = = ⃗⃗⃗⃗⃗ 𝐶𝐵 𝑥𝐵 − 𝑥𝐶 𝑦𝐵 − 𝑦𝐶

6AP) a) Sendo A (1, 3) e B (11, 23), determine o ponto 𝐶(𝑥𝑐 , 𝑦𝑐 ) que divide o segmento orientado AB na razão ¼.
RESOLUÇÃO - CAP 18 - 6AP (a, b), 9AP, 4AS

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