300. if you sold a third. then 2/3 would be left. you can then infer each is 300
I think your answer is going to be 23
Use inverse cosine here because you have the side adjacent to angle A and the hypotenuse. On your calculator, press the 2nd key then cosine to see this on your display

then enter 8/17 to give you an angle measure of 62 degrees.