Based on the side lengths given (a, b, and c), which triangles are right triangles?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative