PLEASE HELP I REALLY NEED IT

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

Aline passes through 3,7 and 6,9 what equation represents the line

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.