Mathematical Symbols and Notations

Front

Symbol: =

Back

Meaning: Equal

Front

Symbol: ≠

Back

Meaning: Not equal

Front

Symbol: ∥

Back

Meaning: Parallel

Front

Symbol: ⊥

Back

Meaning: Perpendicular

Front

Symbol: △ABC

Back

Meaning: Triangle ABC

Front

Symbol: ∠ABC

Back

Meaning: Angle ABC

Front

Rectangle naming

Back

Name the rectangle using its vertices, e.g., ABCD.

Front

Notation: AB ∥ DC

Back

Line AB is parallel to line DC.

Front

Notation: AD ∥ BC

Back

Line AD is parallel to line BC.

Front

Notation: AB = DC

Back

Line AB is equal in length to line DC.