So i have a triangle with sides 10 and 40, and the angle between them is 70 degrees. I don't know any other measurements of this triangle.

I use cosine law to find the 3rd side, which turns out to be 37.8.

Then I found the other 2 angles with sine law, and I obtain 14 degrees and 84 degrees.

However, the weird thing is the three angles do not add up to 180!!

HELP