Question

calcule a distancia entre o ponto a (,1,9) b(2,8)

Answer 1

$d=\sqrt{(1-2)^2+(9-8)^2}=\sqrt{(-1)^2+(1)^2}=\sqrt{1+1}=\sqrt{2}$

Answer 2

√(2-1)² + ( 8 - 9)²
√1²+ (-1)²
√1+1
√2 = 1,41