Question #1b0f2

1 Answer
Apr 21, 2017

Good question, what's c? Maybe it's sqrt 243

Explanation:

If you explain what c is, it would really help. But if c is the length of the bottom/top of the rectangle in the picture, we can find it as follows:

Using the Pythagorean theorem, we can say that:

18^2=c^2+9^2

Now we just solve for c by first subtracting 9^2

18^2-9^2=c^2

then taking the square root

\sqrt(18^2-9^2)=c
\sqrt(324-81)=c
\sqrt(243)=c

Or if you don't want the exact value we can approximate:

c=15.5884573

(in inches of course)