Ashley received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.41 per pound. After buying the coffee, she had left on her card. How many pounds of coffee did she buy?

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.