Extrude faces problem in maya

#1

Hi, im going through a tutorial on modeling in maya. At one point i need to extrude faces inside but my edges started to get curve after using the extrude. I say started because it worked fine before and i dont know what happend, it also works normally on other new objects… Anyone know how to fix this?

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#3

Press 1 on your keyboard. You accidentally pressed 3, turning on subdivs on your mesh. 1 gets you back to normal polygons.