1071：The area

题目描述

Ignatius bought a land last week, but he didn't know the area of the land because the land is enclosed by a parabola and a straight line. The picture below shows the area. Now given all the intersectant points shows in the picture, can you tell Ignatius the area of the land?

Note: The point P1 in the picture is the vertex of the parabola.

输入解释

The input contains several test cases. The first line of the input is a single integer T which is the number of test cases. T test cases follow.
Each test case contains three intersectant points which shows in the picture, they are given in the order of P1, P2, P3. Each point is described by two floating-point numbers X and Y(0.0<=X,Y<=1000.0).

输出解释

For each test case, you should output the area of the land, the result should be rounded to 2 decimal places.

输入样例

2
5.000000 5.000000
0.000000 0.000000
10.000000 0.000000
10.000000 10.000000
1.000000 1.000000
14.000000 8.222222

输出样例

33.33
40.69

提示

For float may be not accurate enough, please use double instead of float.

来自杭电HDUOJ的附加信息

Author	Ignatius.L
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该题目是Virtual Judge题目，来自杭电HDUOJ

源链接： HDU-1071

最后修改于 2020-10-25T22:41:55+00:00 由爬虫自动更新

共提交 249 次

通过率 67.07%

时间上限	内存上限
2000/1000MS(Java/Others)	65536/32768K(Java/Others)