Posted by **Kylie** on Thursday, March 31, 2011 at 9:41am.

Write a radical for exact length of the diagonal of the 30 by 30 dance floor. simplify the radical.

Im not sure how to do this.

- Algebra -
**bobpursley**, Thursday, March 31, 2011 at 10:19am
What is Pythagorean theorem?

- Algebra -
**Jai**, Thursday, March 31, 2011 at 10:21am
since it's 30 by 30, the shape is a square.

recall that the diagonal of a square is given by:

diagonal = sqrt(s)

where s = length of a side

thus, the diagonal is

sqrt(30)

hope this helps~ :)

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