∠∥⊥∆∑
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#geometric symbols
#notation
#proof
#axioms
#theorems
#angle symbol
#parallel symbol
#perpendicular symbol
#triangle symbol
#summation
🚧⊥🚧
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#construction barrier
#physical divider
#up tack
#perpendicular symbol
⊥
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#perpendicular symbol
#up tack symbol
#math symbol
#upside down t symbol
#inverted t shape
#geometric symbols #notation #proof #axioms #theorems #angle symbol #parallel symbol #perpendicular symbol #triangle symbol #summation