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anonymous
 5 years ago
what is the length of a diagonal of a cube with side x
anonymous
 5 years ago
what is the length of a diagonal of a cube with side x

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shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.1If you draw a diagonal, what two shapes do you get in the square?

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.1Right. Are they a particular kind of triangle?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so how do i sole the problem

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.1Sorry. So, you have a right triangle, and the two sides that are not the hypotenuse are of length x. Do you have an equation that will let you calculate the length of the hypotenuse?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0a suared + b squared + c squared ?

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.1\(a^2 + b^2 = c^2\), right, the Pythagorean theorem. So plug it in and solve for c :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thank you so its going to be 2^ + ? + C^ kinda lost again

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0whats the problem going to look ike and the answer please

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.1Yikes, sorry. So if you plug x in, you get: \[\begin{align} x^2 + x^2 &= c^2\\ 2x^2 &= c^2 \end{align}\] We can then take the square root of both sides: \[\begin{align} 2x^2 &= c^2\\ \sqrt{2x^2} &= c\\ x\sqrt{2} = c \end{align}\] And that's it!

shadowfiend
 5 years ago
Best ResponseYou've already chosen the best response.1No problem. Click `good answer' next to my answer :)
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