9️⃣0️⃣↪️

#ninety degrees turn #quarter turn #direction change #right angle turn #90deg

➡️⬆️

#perpendicular #orthogonal #right angle turn #coordinate system #vector #corner #90deg

L↪️

#sideways l #rotate l #letter l turn #l shape turn #right angle turn

➡️⬇️/⬆️➡️

#direction change arrow #two arrows #turn arrow #sharp turn #right angle turn

➡️┘/└⬆️

#corner arrow #l shape arrow #turn arrow #box corner arrow #right angle turn