He drew a dodecagon shape.

He was drawing an icosagon shape.

My birthday is on the twenty-third.

My room is twenty-four square meters.

My father got married when he was twenty-nine.

My birthday is on the twenty-eighth.

My birthday is on the twenty-sixth.

There are twenty-seven students in my class.

My room is twenty-five square meters.

I was able to understand his explanation more than enough.