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May 21st, 2019, 07:45 PM   #11
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Quote:
Originally Posted by skipjack View Post
That requirement is unclear. It doesn't tell you to round your answer or to truncate your answer. What exactly does "accurate to 1 d.p." mean?
We would be rounding. I'm assuming.
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May 21st, 2019, 08:04 PM   #12
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Originally Posted by helpmeddddd View Post
why am I finding the length of r as I already know it?
Although in the specific case of $r^{2}= p^{2} + q^{2}$ you get $r$, what about:

$\displaystyle p^{2} = r^{2} - q^{2}$

or

$\displaystyle q^{2} = r^{2} - p^{2}$

Both of which are derived from the original equation.

Think of equations less as the value of one variable, but more as information for all of them.
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Last edited by skipjack; May 22nd, 2019 at 12:11 AM.
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May 22nd, 2019, 11:33 AM   #13
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Although in the specific case of $r^{2}= p^{2} + q^{2}$ you get $r$, what about:

$\displaystyle p^{2} = r^{2} - q^{2}$

orn for all of them.
Using this I get $\displaystyle p^{2}=11.4^{2}-9.3^{2}$

$11.4^{2}$ = 129.96 -86.49=43.47 the sqaure root of 43.47 is 6.59317829275

so I'd guess you round it to p=6.6
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