Question

Calcule a distância entre os pontos: C(-3,7) e D(5,1)

Answer 1

$Sabemos\ que:\\\\ C=(-3,7)\ \to\ x_C=-3\ \ \| \ \ y_D=7\\ D=(5,1)\ \to\ x_D=5\ \ \| \ \ y_D=1\\\\ Logo:\\\\ d_{CD}=\sqrt{(x_D-x_C)^2+(y_D-y_C)^2}\\ d_{CD}=\sqrt{(5-(-3))^2+(1-7)^2}\\ d_{CD}=\sqrt{(8)^2+(-6)^2}\ \to \ d_{CD}=\sqrt{64+36}\\ d_{CD}=\sqrt{100}\ \to\ \| \ d_{CD}=10\ u.c.\ \|$

Answer 2

dCD=rais de (-3-5)^2+(7-1)^2= 64+36=rais de 100 = 10 unidade de comprimento 
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