144 if a full circle makes 360 and you subtract 72 from it is 288 then you divide it by 2 you get 144. Don’t know if i’m right double check incase!
Answer:
angle c is right angle because,
it is proved by Pythagoras theorem....
now,we check that

90 is the answer to your question!
17 is a prime number because it’s only divisible by 1 and it’s self, so it only has 2 factors.
5 cups of ice, 1.75 pints of sherbet, and 3.5 liters of lemon-lime soda.