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| 10242 | |
| Fourth Point!! | |
| Given are the (x, y) coordinates of the endpoints of two adjacent sides of a parallelogram. Find the | |
| (x, y) coordinates of the fourth point. | |
| Input | |
| Each line of input contains eight floating point numbers: the (x, y) coordinates of one of the endpoints | |
| of the first side followed by the (x, y) coordinates of the other endpoint of the first side, followed by the | |
| (x, y) coordinates of one of the endpoints of the second side followed by the (x, y) coordinates of the | |
| other endpoint of the second side. All coordinates are in meters, to the nearest mm. All coordinates | |
| are between −10000 and +10000. Input is terminated by end of file. | |
| Output | |
| For each line of input, print the (x, y) coordinates of the fourth point of the parallelogram in meters, | |
| to the nearest mm, separated by a single space. | |
| Sample Input | |
| 0.000 0.000 0.000 1.000 0.000 1.000 1.000 1.000 | |
| 1.000 0.000 3.500 3.500 3.500 3.500 0.000 1.000 | |
| 1.866 0.000 3.127 3.543 3.127 3.543 1.412 3.145 | |
| Sample Output | |
| 1.000 0.000 | |
| -2.500 -2.500 | |
| 0.151 -0.398 |