let me make the zero go over right on this side, right over here, so if you did that, notice, your angle will not be within the protractor so you want to be measure your tempting to do this measure these outer angle how we used it is an angle but does not the angle what this question is asking us to measure this is a arc over here telling us that that's the angle that we need to measure so that arc has to be within the protractor so,lets rotates this protractor little bit more i have over did it,and so, this looks like zero degrees and this right over here is 60 degrees. we got that one right too.
ตรงนี้, ถ้าคุณทํามัน, สังเกตดู, มุมของคุณจะไม่อยู่ภายในโปรแทรกเตอร์ แล้วคุณอยากวัด คุณพยายามทําการวัดมุมกลับนี้ ตามที่เราเคยทํา, แต่มันไม่ใช่มุม