QuadrilateralProblem Description One day the little Jack is playing a game with four crabsticks. The game is simple, he want to make all the four crabsticks to be a quadrilateral, which has the biggest area in all the possible ways. But Jack’s math is so bad, he doesn’t know how to do it, can you h. Read More
1.任意四边形的四条边分别为：AB=a,BC=b,CD=c,DA=d 假设一个系数z,其中z=(a+b+c+d)/2 那么任意四边形的面积Ｓ=根号下(z-a)*(z-b)*(z-c)*(z-d)2.四条线段构成四边形（任意）条件： 任意三条线段之和必须大于第四边 Read More