http://www.emaths.co.uk/sats/2009/2009_68_Paper2.pdf < pls click here and go to question 24 and help me solve it
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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.
Does this help?
Using coolubi's example. $\displaystyle a^2+b^2=c^2$ $\displaystyle 22^2=20^2+x^2 $ $\displaystyle x=\sqrt{22^2-20^2}$ $\displaystyle x=2\sqrt{21}$ $\displaystyle 30-x=k$ $\displaystyle 30-2\sqrt{21}=20.84$
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