# V Symbol Geometry Symbols – Glossary Of Mathematical Symbols

## Common Symbols Used in Geometry

Symbols save time and space when writing. Here are the most common geometrical symbols:

SymbolMeaningExampleIn Words
Triangle ABC has 3 equal sides Triangle ABC has three equal sides
Angle

ABC is 45°

The angle formed by ABC is 45 degrees.
Perpendicular AB

CD

The line AB is perpendicular to line CD
Parallel EF

GH

The line EF is parallel to line GH
Degrees 360° 360 degrees (a full rotation!)
Right Angle (90°)

is 90°

A right angle is 90 degrees
Line Segment “AB” AB The line segment between A and B
Line “AB” The infinite line that includes A and B
Ray “AB” The line that starts at A, goes through B and continues on
Congruent (same shape and size) ABC

DEF

Triangle ABC is congruent to triangle DEF
Similar (same shape, different size) DEF

MNO

Triangle DEF is similar to triangle MNO
Therefore a=b

b=a

a equals b, therefore b equals a

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