Question

Calcule a distância entre os pontos:
a) A(-1,4) e B(3,2)
b) C(1,3) e D(9,9)

Answer 1

dAB:
d = \/(xB-xA)² + (yB-yA)²
d = \/(3-(-1))² + (2-4)²
d = \/(3+1)² + (-2)²
d = \/4² + 4
d = \/16+4
d = \/20
d = \/4x5
d = 2\/5

dCD:
d = \/(xD-xC)² + (yD-yC)²
d = \/(9-1)² + (9-3)²
d = \/8²+6²
d = \/64+36
d = \/100
d = 10