How to display svg element in center of web page?

Question

If I want some shape on web page at center like line, square, rectangle, triangles?

Answer 1

Add
 display: block
 to it and then 
margin: auto 
will work as expected.

Answer 2

CSS Pro Tips: Centering Elements by Domino
https://www.sololearn.com/post/37760/?ref=app