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
√(x1—x2)²+(y1—y2)² 代入公式即可
Find the distance between each pair of points.
= 求两点间的距离
1、D = 根号[(2√2 - √2)² + (1 + 3)² ] = 3√2
2、D = 根号[(2√2 + √2)² + (2√3 - √3)²] = √(21)
[(x1-x2)的平方+(y1-y2)的平方]最后开根号