Mathematics Symbols are very important to learn mathematics, on using symbols we can easily understand. 

 Mathematics Symbols can be categorized on their importance in the following ways:

1. Mathematics symbols - Number
2. Mathematics symbols - Basic
3. Mathematics symbols - Algebraic
4. Mathematics symbols - Geometric
5. Mathematics symbols - Trigonometry
6. Mathematics symbols - Set Theory
7. Mathematics symbols - Statistics & Probability
8. Mathematics symbols - Calculus And Analysis
9. Mathematics symbols - Logical
10. Mathematics symbols - Roman
11. Mathematics symbols - Greek
12. Mathematics symbols - Miscellaneous

Now we shall learn /discuss Fourth topic Mathematics symbols - Geometric on this post.

Mathematics symbols - Geometric

 These are very important Basic Tools frequently used by us in algebra as well as in other branches of mathematics and sciences.

Symbol	NAME OF SYMBOL	DEFINITION / MEANING	ILLUSTRATION
∠	Angle	An angle is formed by two rays	∠ABC = 60°
	Measured angle		ABC = 30°
	Zero Angle	An angle of measure zero degree	∠ABC = 0°
∟	Right angle	An angle of measure ninety degrees = 90°	α = 90°
°	Degree	1 turn or round = 360°	α = 60°
deg	Degree	1 turn or round  = 360 deg	α = 60 deg
′	Prime ( Read as different from prime numbers)	Arcminute, 1° = 60′	α = 60°59′
″	Double prime	Arcsecond, 1′ = 60″	α = 60°59′59″
	Line	Infinite line	Drawn from any point
AB	Line segment	The lines from point A to point B	The lines from point B to point A is written as BA
	Ray	The lines that start from any point like A
	Arc	an arc from point A to point B	Part of the circumference of a circle of any measure = 60°
⊥	Perpendicular	Those lines intersect at right angles are perpendicular lines (90° angle).	AC ⊥ BC
∥	Parallel	Those lines do not intersect each other are parallel lines.	AB ∥ CD
≅	Congruent to	Those geometric figures having same shapes and sizes.	∆ABC≅ ∆XYZ
~	Similarity	Those geometric figures having the same shapes but sizes may be different.	∆ABC~ ∆XYZ
Δ	Triangle	Triangle shape	ΔABC≅ ΔBCD
|x-y|	Distance	Distance between  any two points x and y	| x-y | = 2 or 3 or any number
π	Pi constant	π = 3.141592654... is the ratio between the circumference and diameter of a circle and it is an irrational numbers	c = π⋅d = 2⋅π⋅r where r is the radius of circle and d = 2r
rad	Radians	Radians angle unit	360° = 2π rad or 2π c
c	Radians	Radians angle unit	360° = 2π c   or  2π rad
grad	Gradians	Grads angle unit	360° = 400 grad or g
g	Gradians	Grads angle unit	360° = 400 g or grad

Note:- Degree, Gradians and Radians are units of measurements of angles in various systems.
On having knowledge of the above Mathematics symbols - Geometric we can easily enhance our subject ideas.
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