I need help on problem #39 in the picture.

I tried to use the pythagorean theorem to solve it and I got:

64 + r^2 = 16 + r^2

The problem is, if I do it like that I end up eliminating the variable.

Please let me know if you have any idea on how I can solve this problem.

Thanks!

- stapel_eliz
**Posts:**1731**Joined:**Mon Dec 08, 2008 4:22 pm-
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kec21631 wrote:

I need help on problem #39 in the picture.

I tried to use the pythagorean theorem to solve it and I got:

64 + r^2 = 16 + r^2

Hint: (4 + r)

. . . . .

Oh! I get it now, thanks!