📐∟

#right triangle #90 degrees #triangle ruler #set square #right angle symbol

📐📏∟

#right triangle #triangle ruler #right angle symbol

🔺∟

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

∟📐

#right triangle #right angle symbol #l shape #angle measure

∟△

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

📈➡️∟

#normal line #tangent line #perpendicular line #coordinate system #right angle symbol