triangle

import math

def checkio(a, b, c):
    if a + b > c and a + c > b and b + c > a:
        angles = []
        angles.append(math.degrees(math.acos((a**2+b**2-c**2)/(2*a*b))))
        angles.append(math.degrees(math.acos((a**2+c**2-b**2)/(2*a*c))))
        angles.append(180-angles[0]-angles[1])
        return sorted(angles)
    return [0, 0, 0]

#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
    assert checkio(4, 4, 4) == [60, 60, 60], "All sides are equal"
    assert checkio(3, 4, 5) == [37, 53, 90], "Egyptian triangle"
    assert checkio(2, 2, 5) == [0, 0, 0], "It's can not be a triangle"