# Math Help - help!! pythogras theorem

1. ## help!! pythogras theorem

http://www.emaths.co.uk/sats/2009/2009_68_Paper2.pdf < pls click here and go to question 24 and help me solve it

2. You want me to open a PDF from an unknown source? Pass

Can you post it in plain text please?

3. Originally Posted by coolubi
http://www.emaths.co.uk/sats/2009/2009_68_Paper2.pdf < pls click here and go to question 24 and help me solve it
the link is to a test.

4. Does this help?

5. Using coolubi's example.

$
a^2+b^2=c^2$

$22^2=20^2+x^2$
$x=\sqrt{22^2-20^2}$
$x=2\sqrt{21}$

$30-x=k$

$30-2\sqrt{21}=20.84$