Enable Javascript in your browser and then refresh this page, for a much enhanced experience.
Cosine theorem + α, β solution in Clear category for The Angles of a Triangle by Lemmi
import math
def checkio(a, b, c):
if a + b + c - max(a, b, c) <= max(a, b, c):
return [0, 0, 0]
α, β = [round(math.degrees(math.acos(x)))\
for x in [(a*a + b*b - c*c)/(2*a*b), (b*b + c*c - a*a)/(2*b*c)]]
return list(sorted([α, β, 180 - α - β]))
#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"
July 24, 2017