The area面积计算

作者: AliciaDimarco 分类: 算法与数据结构 发布时间: 2014-10-25 10:53 阅读: 1,593

Problem Description

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.

The area面积计算

Input

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).

Output

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

Sample Input

Sample Output

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