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# Finding the exact perimeter of a square inscribed in a circle?

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Here's the problem:

I already solved the answer for 15.a) which is $$2{\sqrt{38}}$$ m, what I need help is with part b.

Here's my work:

but the answer is $${8\sqrt{19}}$$ m.

What did I do wrong?

Guest Jul 18, 2018
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You haven't done anything wrong! You have just calculated ONE SIDE of the square!!.

So, all you have to do is multiply: 4 x 2sqrt(19) =8 sqrt(19).

Guest Jul 19, 2018