关于数学题(英文)findthedistancebetweeneachpairofpoints.1.(√2,-3),(2√2,1)2.(-√2,√3),(2√2,2√3)好象我以前初几在中国就学过了,不过现在忘的一干二净了.

Question

关于数学题(英文)
find the distance between each pair of points.
1.(√2,-3),(2√2,1) 2.(-√2,√3),(2√2,2√3) 好象我以前初几在中国就学过了,不过现在忘的一干二净了.

Answer 1

1.3√2
(2√2-√2)^2+(1-(-3))^2=2+16=18
√18=3√2
2.√21
(2√2-(-√2))^2+(2√3-√3)^2=18+3=21
√21