📐□

#right triangle #triangle ruler #square corner #90 degree angle #right angle

∟△

#right angle symbol #triangle symbol #90 degree angle #right triangle

△∟

#right-angled triangle #90 degree angle #trigonometry

🔽📐

#upside down triangle #down triangle button #right angle triangle #triangle ruler #inverted triangle #90 degree angle

🔻📐

#upside down triangle #red down triangle #right angle triangle #triangle ruler #inverted triangle #90 degree angle

📐👇

#right angle pointing down #upside down angle #geometric orientation #triangle ruler #down direction #90 degree angle