中四數學直線的坐標幾何 thank.?
回答 (1)
2015-08-31 3:55 pm
✔ 最佳答案
1.(a)
AB的距離
= √[(2 - 6)² + (3 - 0)²]
= √25
= 5
(b)
CD的距離
= √[(-1 - 1)² + (2 + 3)²]
= √29
(c)
MN的距離
= √[(√3 - 0)² + (4 - 5)²]
= √4
= 2
(d)
ST的距離
= √[(-7 + 3)² + (-5 - 1)²]
= √52
= 2√13
收錄日期: 2021-04-18 00:07:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150831053819AA3tITJ