What’s the answer to the question

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Which statement best explains why ben uses the width hi to create the arc at j from point k