Polygons abcd and efgh are similar. explain what this mean?

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?

Select the correct answer and solve for y

Rewrite the equation x = 65 - 60p by factoring the side that contains the variable p.