anonymous
  • anonymous
Fan and medal :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
What is the length of the unknown side of the right triangle? A right triangle with hypotenuse x and legs 21 and 20 21 29 400 441
Astrophysics
  • Astrophysics
Use the pythagorean theorem as before
Astrophysics
  • Astrophysics
Now you set it up

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anonymous
  • anonymous
can i see the formula again?
Astrophysics
  • Astrophysics
\[a^2+b^2=c^2\]
anonymous
  • anonymous
so in the Pythagorean Theorem, \[a ^{2}+b ^{2}=c ^{2}\] where the a and b represent the legs of the triangle, and c is the hypotenuse
anonymous
  • anonymous
21^2+20^2=
anonymous
  • anonymous
correct
Astrophysics
  • Astrophysics
Yes good! so you have \[21^2+20^2 = x^2\]
Astrophysics
  • Astrophysics
Keep going :)
anonymous
  • anonymous
ok 21*21 right?
anonymous
  • anonymous
yes, do 21*21, and 20*20
anonymous
  • anonymous
then add them up
Astrophysics
  • Astrophysics
Yup
anonymous
  • anonymous
to get part of your answer
anonymous
  • anonymous
kk 441+400=
Astrophysics
  • Astrophysics
Good, keep going
anonymous
  • anonymous
then, you must find the square root of that "part of the answer"
anonymous
  • anonymous
so find the square root of 841
anonymous
  • anonymous
ok 29? XD
Astrophysics
  • Astrophysics
Ok well since you said square root already haha, I will show you why exactly we take the square root, via algebra. |dw:1438607451660:dw| when you take the square root we have a positive and negative answer but you don't need to really worry about that, that's the algebra behind it.
Astrophysics
  • Astrophysics
Yes, 29
anonymous
  • anonymous
29 is correct
anonymous
  • anonymous
thx

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