anonymous
  • anonymous
If a and b are two sides of a right triangle, find the length of the hypotenuse, c. a=8, b=4, c=?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
so do you know the formula?
anonymous
  • anonymous
a^2 + B^2=c^2
anonymous
  • anonymous
heck no

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anonymous
  • anonymous
oh
purplemexican
  • purplemexican
8^2+4^2=c^2 youll want to \[\sqrt{c}\]
anonymous
  • anonymous
do whaa
anonymous
  • anonymous
so just plug a and b in and then you take the square root of c
anonymous
  • anonymous
how do you do that
anonymous
  • anonymous
so 80?
pooja195
  • pooja195
This is called the Pythagorean theorem \[\huge~\rm~a^2+b^2=c^2\] |dw:1439387408714:dw| \[\huge~\rm~8^2+4^2=c^2\] \[\huge~\rm~64+16=c\]
pooja195
  • pooja195
Once you find 64+16 just square root it
anonymous
  • anonymous
yes then you take the square root of that
anonymous
  • anonymous
i dont know how to square root haha that is why i need help
pooja195
  • pooja195
whats 64+16?
purplemexican
  • purplemexican
\[8^2+4^2=c^2\ or \sqrt{80}\]
pooja195
  • pooja195
right you might need to use a calc for that when you do you get a decimal \[\huge~\rm~8.944272 \]
pooja195
  • pooja195
From there just take the first 3 numbers
pooja195
  • pooja195
so about 8.94
anonymous
  • anonymous
or you could simplify 80.
anonymous
  • anonymous
so 9?
pooja195
  • pooja195
\(\color{#0cbb34}{\text{Originally Posted by}}\) @pooja195 so about 8.94 \(\color{#0cbb34}{\text{End of Quote}}\) this
anonymous
  • anonymous
guys this is a multiple choice and the answers aern't numbers like that
anonymous
  • anonymous
\[\sqrt{16+5}=4\sqrt{5}\]
anonymous
  • anonymous
that is the answer
pooja195
  • pooja195
@kylefoster58 it would help if u put the answer choices
anonymous
  • anonymous
sorry haha
lfreeman1285
  • lfreeman1285
Here you use the Pythagorean theorem which is a^2 + b^2 = c^2 a and b are the legs of the triangle while c is the hypotenuse. All you have to do is fill in the variables and solve for c. Therefore, (8)^2 + (4)^2 = c^2 64 + 16 = 80 But because 80 is c^2, you have to square root it. \[\sqrt{80}\] = \[4\sqrt{5}\] and that's your final answer.
pooja195
  • pooja195
^thats right
anonymous
  • anonymous
its D.
anonymous
  • anonymous
4 square root of 5 right
anonymous
  • anonymous
thank yall again!!

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