Question

1)
2)
3)

Пожалуйста помоги

Answer 1

1) A(-1;4) B(5;-4)
$ab = sqrt{(5 - ( - 1))^{2} + ( - 4 - 4)^{2} } = 10$
2) C(3;8) D(-1;5)
$ab = sqrt{( - 1 - 3) ^{2} + (5 - 8) ^{2} } = 5$
3) K(5;-3) L(-1;0)

$ab = sqrt{( - 1 - 5)^{2} + (0 - ( - 3)) ^{2} } = sqrt{45} = 3 sqrt{5}$