Diagonal
Definition of Diagonal

• Diagonal is a Line segment connecting two non-adjacent vertices of a polygon.

Examples of Diagonal

• In the example shown, AC is a diagonal.              

More about Diagonal

• The number of diagonals of a Polygon of n sides can be found using the Formula .

Solved Example on Diagonal

Justin walked along the Diagonal of a square garden of side 20 ft. How far did he walk?
Choices:
A. 29.40 ft
B. 28.40 ft
C. 27.16 ft
D. 28.28 ft
Correct Answer: D
Solution:
Step 1: Side Length of the square field is s = 20 ft.           
Step 2: Distance that Justin walked = Length of the Diagonal of the square field = = 28.28 ft.    

Related Terms for Diagonal

• Line Segment
• Polygon
• Non-adjacent Vertices

Additional Links for Diagonal

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