Created
February 15, 2018 08:18
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| def get_length_square(p1, p2): | |
| return (p1[0]-p2[0])**2 + (p1[1] - p2[1])**2 | |
| def check_angle(p1, p2, p3): | |
| return get_length_square(p1, p3) == get_length_square(p1, p2) + get_length_square(p2, p3) | |
| def count_right_angles(coords): | |
| count = 0 | |
| if check_angle(coords[0],coords[1],coords[2]): | |
| count = count + 1 | |
| if check_angle(coords[1],coords[2],coords[3]): | |
| count = count + 1 | |
| if check_angle(coords[2],coords[3],coords[0]): | |
| count = count + 1 | |
| if check_angle(coords[3],coords[0],coords[1]): | |
| count = count + 1 | |
| return count | |
| if __name__ == '__main__': | |
| test_data = [[-1, 0], [-1, 4], [2, 4], [4, 1]] | |
| print(count_right_angles(test_data)) |
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