#05AB1E, 8 6 bytes

Thanks to @quartata for letting me know about the square-root function

Dgtô¶ý

Try it online!

###Explanation

D     Implicit input. Duplicate
g     Number of elements
t     Square root
ô     Split into chunks of that length
¶     Push newline character
ý     Join list by newlines. Implicit display

05AB1E, 8 6 bytes

Thanks to @quartata for letting me know about the square-root function

Dgtô¶ý

Try it online!

Explanation

D     Implicit input. Duplicate
g     Number of elements
t     Square root
ô     Split into chunks of that length
¶     Push newline character
ý     Join list by newlines. Implicit display

#05AB1E, 8 6 bytes

Thanks to @quartata for letting me know about the square-root function

Dgtô¶ý

Try it online!

###Explanation

D     Implicit input. Duplicate
g     Number of elements
t     Square root
ô     Split into chunks of that length
¶     Push newline character
ý     Join list by newlines. Implicitly display

#05AB1E, 8 6 bytes

Thanks to @quartata for letting me know about the square-root function

Dgtô¶ý

Try it online!

###Explanation

D     Implicit input. Duplicate
g     Number of elements
t     Square root
ô     Split into chunks of that length
¶     Push newline character
ý     Join list by newlines. Implicit display

#05AB1E, 8 6 bytes

Thanks to @quartata for letting me know about the square-root function

Dgtô¶ý

Try it online!

#05AB1E, 8 6 bytes

Thanks to @quartata for letting me know about the square-root function

Dgtô¶ý

Try it online!

###Explanation

D     Implicit input. Duplicate
g     Number of elements
t     Square root
ô     Split into chunks of that length
¶     Push newline character
ý     Join list by newlines. Implicitly display