Brainliest to the right answer! Plz don’t answer just for points I need to get a good grade on this

Which expression gives the area of the triangle shown below

The variable in a relation who’s value depends on the value of the independent variable is called what?

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false