You are in math class.
1. Which class are you in?
2. I'm in math class.
Which class are you in?
====================
What is the similar sentence to the previuous one?
2 answers
Yes, your sentences and question are correct. These are also possible, depending on what you mean:
What class are you taking?
I'm taking World History 1.
I'm in math class each afternoon.
What class are you in right now?
I'm in math.
I'm in English class.
What courses are you taking?
I'm taking physics and Spanish.
Which graduating class are you in?
I'm in the class of 2018.
What class are you taking?
I'm taking World History 1.
I'm in math class each afternoon.
What class are you in right now?
I'm in math.
I'm in English class.
What courses are you taking?
I'm taking physics and Spanish.
Which graduating class are you in?
I'm in the class of 2018.