Which type of angle do construction workers use when building to make sure that the walls and floors of a building are perpendicular?

the answer is right angle hehhehehehhe

wth

LMAOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO SRY MAYBE TO MANY O'S -_- OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO SRY SCHOOL MAKES ME SAD AND DEPRESSED AND STRESSED

Um... Did I show up at a bad time?

about 4 years late yea I think ya did

what are u giggly about huh

:O U ALMOST MADE ME MESS UP GIRL WHATS WRONG WITH YOU WE HERE STRUGLIN AND UR PLAYING AROUND -punchs her and gives her a bloody black purple ugly very nasty eye- >:C GROWLS