Question

Given the regular decagon what is the measure of each given angle

Answer 1

I believe it’s the third option

Answer 2

"deca-" signifies "tens."    A full circle is 360 degrees, so angle 1 is 360 degrees divided by 10, or 36 degrees.  That means that answer choice 3 is correct.  But note that I could not read choice 4.  Before you accept this response from me, go back and check choice 4.  The measure of angle 1 MUST be 36 degrees.