# Length of the diagonal of a square when perimeter is known.

• Jun 7th 2010, 04:10 PM
DOOKIE
Length of the diagonal of a square when perimeter is known.
What is the approximate length of
the diagonal of a square if the
perimeter of the square is 12 ft?
• Jun 7th 2010, 04:13 PM
skeeter
Quote:

Originally Posted by DOOKIE
What is the approximate length of
the diagonal of a square if the
perimeter of the square is 12 ft?

what is your take on this problem?
• Jun 7th 2010, 04:18 PM
mr fantastic
Quote:

Originally Posted by DOOKIE
What is the approximate length of

the diagonal of a square if the
perimeter of the square is 12 ft?

Can you find the sidelength of the square?

Have you learned Pythagoras' Theorem?
• Jun 7th 2010, 04:30 PM
DOOKIE
Yes.
• Jun 7th 2010, 04:45 PM
mr fantastic
Quote:

Originally Posted by DOOKIE
Yes.

If you know the sidelength and you know Pythagoras's theorem then you can find the diagonal. If you want more help, show all your working and say where you're stuck.