4-9-12 homework

In chapter 10, I learned things about a circle that i never knew before and really surprised me. I already knew about a chord, diameter, and a radius. But in this chapter I have learned what an arc, secant, and tangent are. I also learned different kinds of angles that I will work with for my whole life. Also, architects are going to use different angles to make up different shapes to use in a structure. the one question i have is how can you identify what i secant is?